Pool man in trouble invites ridicule (7)
I believe the answer is:
lampoon
'invites ridicule' is the definition.
'lampoon' can be an answer for 'ridicule' (I've seen this in another clue). I am not sure about the 'invites' bit.
'pool man in trouble' is the wordplay.
'in trouble' is an anagram indicator.
'pool'+'man'='poolman'
'poolman' is an anagram of 'LAMPOON'.
Can you help me to learn more?
(Other definitions for lampoon that I've seen before include "Piece of writing that ridicules someone" , "Literary satire" , "ridiculous scenario" , "Mock" , "Burlesque" .)