Ginger individual Oscar managed stomach pain regularly (5-4)
I believe the answer is:
orang-utan
'ginger individual' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'oscar managed stomach pain regularly' is the wordplay.
'oscar' becomes 'O' (phonetic alphabet: alpha, bravo, charlie etc.).
'managed' becomes 'ran' (both can mean organised or was in charge of).
'stomach' becomes 'gut' (I've seen this in another clue).
'pain regularly' becomes 'an' (I can't explain this - if you can you should believe this answer much more).
'o'+'ran'+'gut'+'an'='ORANG-UTAN'
Can you help me to learn more?
(Other definitions for orang-utan that I've seen before include "Great ape" , "Ape of Borneo and Sumatra" , "Species of ape" , "Angora nut for long-armed ape of Burma" , "Endangered ape" .)