Annoys son -- that's uncalled-for! (8)
I believe the answer is:
needless
'that's uncalled-for' is the definition.
(synonyms)
'annoys son' is the wordplay.
'annoys' becomes 'needles' (I've seen this before).
'son' becomes 's' (genealogical abbreviation for son).
'needles'+'s'='NEEDLESS'
(Other definitions for needless that I've seen before include "Surplus to requirements" , "Unwanted" , "for no good reason" , "Superfluous" , "Unnecessary, avoidable" .)