Back injury — ending for female's mum? (9)
I believe the answer is:
noiseless
'female's mum?' is the definition.
'noiseless' can be an answer for 'mum?' (I've seen this before). I'm not sure about the 'female's' bit.
'back injury ending for' is the wordplay.
'back' says the letters should be written backwards.
'injury' becomes 'lesion' (lesion is a kind of injury).
'ending for' becomes 'ess' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'lesion' reversed gives 'noisel'.
'noisel'+'ess'='NOISELESS'
Can you help me to learn more?
(Other definitions for noiseless that I've seen before include "unsound?" , "Mum" , "Lionesses (anag) - making no sound" , "with a silencer?" , "Silent, quiet" .)