Possibly general gatherer of leftovers (7)
I believe the answer is:
gleaner
'gatherer of leftovers' is the definition.
'gleaner' can be an answer for 'gatherer' (gleaner is a kind of gatherer). I'm unsure of the 'of leftovers' bit.
'possibly general' is the wordplay.
'possibly' indicates anagramming the letters.
'general' is an anagram of 'GLEANER'.
Can you help me to learn more?
(Other definitions for gleaner that I've seen before include "one gathers" , "Collector of leftover grain after a harvest" , "Leftover grain gatherer" , "One gathering (grain) after a harvest" , "Description of Ruth" .)