Sort of square circle in the town? (5)
I believe the answer is:
tring
'the town?' is the definition.
(I've seen this before)
'sort of square circle' is the wordplay.
'sort of square' becomes 'T' (a T-Square is a technical drawing instrument).
'circle' becomes 'ring' (synonyms).
't'+'ring'='TRING'
'in' acts as a link.
(Other definitions for tring that I've seen before include "Hertfordshire town" , "town in Herts" .)