Beginning to be upset about daughter's achievements (5)
I believe the answer is:
deeds
'achievements' is the definition.
(deed is a kind of achievement)
'beginning to be upset about daughter's' is the wordplay.
'beginning' becomes 'seed' (seed is a kind of beginning).
'to be upset' is a reversal indicator (I've seen 'being upset' mean this).
'about' is an insertion indicator.
'daughter' becomes 'd' (genealogical abbreviation).
'seed' in reverse letter order is 'dees'.
'dees' enclosing 'd' is 'DEEDS'.
(Other definitions for deeds that I've seen before include "Actions" , "Feats" , "legal documents" , "Activities" , "Exploits" .)