One enjoying a good meal after removing a small ulcer (6)
I believe the answer is:
fester
'small ulcer' is the definition.
'fester' can be an answer for 'ulcer' (thesaurus). I'm not certain of the 'small' bit.
'one enjoying a good meal after removing a' is the wordplay.
'one enjoying' is an insertion indicator.
'a good meal' becomes 'es' (I can't justify this - if you can you should give a lot more credence to this answer).
'removing' indicates named letters should be taken away.
'after' with 'a' taken out is 'fter'.
'es' put within 'fter' is 'FESTER'.
Can you help me to learn more?
(Other definitions for fester that I've seen before include "Become rotten, bitter or irritated" , "Of wound, become septic and filled with pus" , "Putrefy" , "Ripen and generate pus" , "Suppurate" .)