Aged husband starts to grip (4)
I believe the answer is:
hold
'to grip' is the definition.
(synonyms)
'aged husband starts' is the wordplay.
'aged' becomes 'old' (similar in meaning).
'husband' becomes 'h' (abbreviation).
'starts' is a charade indicator (letters next to each other).
'old' after 'h' is 'HOLD'.
(Other definitions for hold that I've seen before include "Continue" , "Ship's storage space" , "Have or possess" , "Grasp; clutch" , "Keep; cargo space" .)