Son having anger for father (4)
I believe the answer is:
sire
'father' is the definition.
(I've seen this before)
'son having anger' is the wordplay.
'son' becomes 's'.
'having' means one lot of letters go next to another.
'anger' becomes 'ire' ('ire' can be a synonym of 'anger').
's'+'ire'='SIRE'
'for' is the link.
(Other definitions for sire that I've seen before include "Old form of address to king - rise to it" , "Male parent of, say, horse" , "Rise for male parent (4)." , "Male parent of an animal" , "Stallion; beget" .)