Quail mum has on ice (6)
I believe the answer is:
shrink
'quail' is the definition.
(I know that quail can be written as shrink)
'mum has on ice' is the wordplay.
'mum' becomes 'sh' (both can be used to tell someone to be quiet).
'has on ice' becomes 'rink' (I can't justify this - if you can you should believe this answer much more).
'sh'+'rink'='SHRINK'
Can you help me to learn more?
(Other definitions for shrink that I've seen before include "Become smaller, contract" , "decline" , "Withdraw from" , "Draw back from the psychiatrist?" , "Grow smaller like slangy psychiatrist" .)