Figure to finish a repair (4)
I believe the answer is:
mend
'a repair' is the definition.
(I've seen this before)
'figure to finish' is the wordplay.
'figure' becomes 'm' (I can't justify this - if you can you should give a lot more credence to this answer).
'to finish' becomes 'end' ('end' can be a synonym of 'finish').
'm'+'end'='MEND'
Can you help me to learn more?
(Other definitions for mend that I've seen before include "Make improvements" , "Put right" , "Heal" , "Fix, repair" , "'Restore, fix (4)'" .)