Dine in hot weather in Albert Square? (3)
I believe the answer is:
eat
'dine' is the definition.
(I've seen this before)
'hot weather in albert square?' is the wordplay.
'hot weather in albert' becomes 'ea' (I am not sure about this - if you are sure you should believe this answer much more).
'square?' becomes 't' (a T-Square is a technical drawing instrument).
'ea'+'t'='EAT'
'in' is the link.
(Other definitions for eat that I've seen before include "Worry" , "Scoff" , "Have 23d [MEAL]" , "Ingest" , "Munch" .)