Block and (in Paris) street surrounding it (4)
I believe the answer is:
sett
'block' is the definition.
(type of paving block)
'and in paris street surrounding it' is the wordplay.
'and in paris' becomes 'et' ('and' in French).
'street' becomes 'st' (abbreviation).
'surrounding it' indicates putting letters inside.
'et' put within 'st' is 'SETT'.
(Other definitions for sett that I've seen before include "Underground 10 [HOUSE]" , "habitat" , "Badgers' lair" , "beastly home" , "Badger's residence" .)