A balanced, regular guy (6)
I believe the answer is:
evened
'a balanced' is the definition.
I can't tell whether this definition defines the answer.
'regular guy' is the wordplay.
'regular' becomes 'even' ('even' can be similar in meaning to 'regular').
'guy' becomes 'ed' (I can't justify this - if you can you should believe this answer much more).
'even'+'ed'='EVENED'
Can you help me to learn more?
(Other definitions for evened that I've seen before include "Made level" , "Made smooth and regular" , "Made smooth or equalised" , "Levelled" .)