I really do hope it goes well for you 
I emailed this:
Dear (lovely lady)
I apologise for this as I am unsure if it is the correct etiquette to ask. After replying to your email I received a tweet from [your lovely company] which said the following:
'Well done!!! It sounds intriguing I must say!'
This is the first competition that I have entered any of my work in and, being a new writer, I am unsure as to whether this means 'please send it to us so we can read it.' I would be more then happy to send the manuscript to you if this is the case but I thought it best to check whether it is appropriate in fear that I will commit some cardinal sin that will end my career before it's begun.
I would really appreciate it if you could clarify this for me as I am scratching my head a little.
Yours
In hindesight, I'm not 100% sure it was a good idea. I thought it best to check though.