It's completely in Central London (3)

I believe the answer is:

all

'it's completely' is the definition.
(synonyms)

'in central london' is the wordplay.
'in' says the answer is hidden in the clue.
'ALL' is hidden within 'central london'.

(Other definitions for all that I've seen before include "and 18: 'Sing through -- --' (carol)" , "Garden passage between trees or bushes" , "'... things come to those who wait'" , "Long avenue or garden path" , "100%" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.