Be anxious having wife in residence (5)
I believe the answer is:
sweat
'residence' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'be anxious having wife' is the wordplay.
'be anxious' becomes 'seat' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'having' is an insertion indicator.
'wife' becomes 'w' (abbreviation).
'seat' placed around 'w' is 'SWEAT'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for sweat that I've seen before include "It's hard work" , "Waste (anag.)" , "Trouble in Australia" , "Perspire" , "Soldier" .)