Not far from a broken chin (4)
I believe the answer is:
inch
'not far' is the definition.
I can't tell whether this definition defines the answer.
'a broken chin' is the wordplay.
'a broken' indicates anagramming the letters.
'chin' is an anagram of 'INCH'.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for inch that I've seen before include "Linear measure" , "The island is very small in length" , "Thirty-sixth of yard" , "Move slowly, in small steps" , "A very little" .)