Tender god of love turns up (4)
I believe the answer is:
sore
'tender' is the definition.
(I know that tender can be written as sore)
'god of love turns up' is the wordplay.
'god of love' 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 "Painful, or the source of pain" , "Bruised" , "See 16" , "Boil" , "Hurting, painful" .)