Can I sue someone for slander?

[WhoTheFuckDoesThis]

Briefly, I have been the subject of a witch hunt on social media. The accusations are horrid, threats have been made to me but the relevant authorities have seen this to be untrue.
The people (incl family) who said this are still bitter and although the post on social media was removed after I called the police, they are still spreading their poison.
So, can any solicitor/lawyer please tell me how does one sue someone for slander? Is it criminal or civil? Would I have a good chance of winning?
Any advice welcome please and thank you

Slander is a civil matter. You need to consult a lawyer who specialises in this area. No-one can tell you your chances of winning on the basis of the limited information you have posted here.

To OP

I asked my solicitor same question about 2 years ago during divorce. Ex made accusations in writing that parents were helping me to hide capital. Reply was;

Slander cases are hard to prove and often expensive. To stand a chance of success I would have to prove I had suffered a loss due to the other person's comments. As my Ex was the applicant for the Financial Order the burden of proof was upon them to support their statements.

In essence I was told to forget about it.

Thanks! Clearly, I can't go into details but I was accused of an act of cruelty. I think I would struggle to prove I had suffered a loss due to the comments. Am speaking to a solicitor next week.

You don't have to suffer a financial loss. You have to show that the comments have seriously damaged your reputation or that they are likely to do so.

It would be libel, OP, not slander. Slander is when it's spoken; libel is when it's written.

Were you named or photographed on social media, or was your identity only clear to you from the context of the post?

@Trethew I was named, my profile shared, pictures of me were shared thanks to family members and I called the police as my address was being requested. The post was deliberately made public and encouraged to share.

Oh I see. Just that my sister was caught in a FB storm where certain actions were attributed to her. She recognized herself from the narrative, but because her name was not given, and there was no picture of her, the solicitor said she could not be identified, so there was no point in pursuing it

Ah, sorry for your sister, trials by social media are disgusting. No, I was named, shamed and hated. Judge, jury and executioner. I have screenshots.

Could some sort of barring or restraining order for whoever posted that be an option?

Legally, not really unless the person continues to harass me.
Civilly, I'm not sure. I aim to speak to a solicitor and/or CAB next week.

My parents and I had some very nasty things written about us that came to light during a court case my dad was furious and wanted to sue my solicitor basically said it wasn't worth going any further with it