More inquisitive about centre of Halifax getting louder (7)
I believe the answer is:
noisier
'louder' is the definition.
('noisy' is associated in meaning with 'loud')
'more inquisitive about centre of halifax' is the wordplay.
'more inquisitive' becomes 'nosier' (nosy means overly inquisitive or curious).
'about' indicates putting letters inside.
'centre of' means to look at the middle letters.
The middle of 'halifax' is 'i'.
'nosier' going around 'i' is 'NOISIER'.
'getting' is the link.
(Other definitions for noisier that I've seen before include "Louder" , "More of a racket" , "Less quiet" , "more deafening!" , "Perhaps more disturbing" .)