Cool match official occasionally cried quietly (7)
I believe the answer is:
refresh
'cool match' is the definition.
'refresh' can be an answer for 'cool' (I've seen this before). I'm not sure about the 'match' bit.
'official occasionally cried quietly' is the wordplay.
'official' becomes 'ref' (match official in football, say).
'occasionally' means one should take alternating letters.
'quietly' becomes 'sh'.
The alternating letters of 'cried' are 're'.
'ref'+'re'+'sh'='REFRESH'
Can you help me to learn more?
(Other definitions for refresh that I've seen before include "Reinvigorate" , "Invigorate, make new again" , "give life again to..." , "Restore strength and vigour as with food and drink" , "Give drink to" .)