What Sunak will do at election time -- leave the city (2,2,3,7)
I believe the answer is:
go to the country
'what sunak will do at election time' is the definition.
(to go to the country is to call a general election)
'leave the city' is the wordplay.
I cannot really understand how this works, but
'leave' could be 'go' (to go is to depart or leave) and 'go' is found in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
'city' could be 'ec' (the City of London postcode) and 'ec' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for go to the country that I've seen before include "enable possible political change" , "make state visit" , "Call an election" , "Abandon urban areas" , "PM may have to?" .)