Reduce one's commission (3)
I believe the answer is:
cut
This clue could be a double definition.
'reduce' is the first definition.
(synonyms)
'one's commission' is the second definition.
'cut' can be an answer for 'commission' (thesaurus). I am unsure of the 'one's' bit.
Can you help me to learn more?
(Other definitions for cut that I've seen before include "Shorten; remove" , "Gash" , "Truncate; slice" , "Fail to attend" , "Sever - hurt - snub" .)