Cranky one to go over the repair (10)
I believe the answer is:
crosspatch
'cranky one' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'go over the repair' is the wordplay.
'go over' becomes 'cross' (to cross over).
'the repair' becomes 'patch' (I have seen 'temporary repair' mean 'patch' so perhaps 'repair' could also mean 'patch').
'cross'+'patch'='CROSSPATCH'
'to' is the link.
Can you help me to learn more?
(Other definitions for crosspatch that I've seen before include "peevish person" , "Ill-natured type" , "bad-tempered type" , "Bad-tempered person" , "Irascible type" .)