It's not far from Finchley (4)
I believe the answer is:
inch
'it's not far' is the definition.
I can't judge whether this definition defines the answer.
'from finchley' is the wordplay.
'from' says the answer is hidden in the clue.
'INCH' can be found hidden inside 'finchley'.
Can you help me to learn more?
(Other definitions for inch that I've seen before include "Twenty five point four millimetres" , "1/12 of foot" , "Creep - a very short distance" , "make slow progress" , "Move forward slowly and carefully" .)