Don't complain. The clitoris is not relevant to the areas covered in KS3 science. Questions about it might be answered in a class discussion and may be covered during PSHE lessons.
My reproduction lessons in year 7 cover changes in puberty, specialised cells (egg and sperm) and their adaptations, male reproductive system (testes, sperm duct, penis, etc) female reproductive system (ovum, ovaries, oviduct, uterus, cervix, vagina) and then we move on to plant reproduction drawing direct comparisons to the human reproductive systems.
In Year 8 we recover the human aspects of reproduction and move on to sexual intercourse and the journey of the sperm cells (from a science perspective not emotional or pleasure - with the exception that mutual consent will be covered), fertilisation, development of a baby and contraception.
These lessons are always open for class discussion and if someone asked what a clitoris was I would answer and move on.
PSHE will cover sex and relationships from the emotional side.