Support husband, advanced in years (4)
I believe the answer is:
hold
'support' is the definition.
(I know that support can be written as hold)
'husband advanced in years' is the wordplay.
'husband' becomes 'h'.
'advanced in years' becomes 'old' (I've seen this in another clue).
'h'+'old'='HOLD'
(Other definitions for hold that I've seen before include "See 12" , "Grip" , "Ship's cargo area" , "Contain" , "Clasp" .)