Wounded lover boy turns up (4)
I believe the answer is:
sore
'wounded' is the definition.
(I've seen this in another clue)
'lover boy turns up' is the wordplay.
'lover boy' becomes 'eros' (I've seen this in another clue).
'turns up' says the letters should be written in reverse.
'eros' in reverse letter order is 'SORE'.
(Other definitions for sore that I've seen before include "Raw or annoyed" , "Painful - resentful" , "Spot of aggravation" , "Hard" , "Causing or suffering pain" .)