Pull in finally in London? (4)
I believe the answer is:
town
'london?' is the definition.
(I've seen this before)
'pull in finally' is the wordplay.
'pull' becomes 'tow' (tow is a kind of pull).
'finally' indicates one should take the final letters.
The last letter of 'in' is 'n'.
'tow'+'n'='TOWN'
'in' acts as a link.
(Other definitions for town that I've seen before include "Nelson, for example" , "Urban area larger than a village" , "eg Ripley" , "Tinsel- is sometimes applied to Hollywood" , "Milton Keynes, say, with 1a [NEW]" .)