Reduce size of quiet skating area (6)
I believe the answer is:
shrink
'reduce size' is the definition.
'shrink' can be an answer for 'reduce' (synonyms). I'm not sure about the 'size' bit.
'quiet skating area' is the wordplay.
'quiet' becomes 'sh' (both can be said to tell someone to be quiet).
'skating area' becomes 'rink' (I've seen this in another clue).
'sh'+'rink'='SHRINK'
'of' is the link.
Can you help me to learn more?
(Other definitions for shrink that I've seen before include "Become smaller, contract" , "Contract, reduce" , "Contract for a psychiatrist?" , "Reduce in size" , "Diminish" .)