Little corner of a rugged chine (5)
I believe the answer is:
niche
'little corner' is the definition.
'niche' can be an answer for 'corner' (I've seen this in another clue). I'm not certain of the 'little' bit.
'a rugged chine' is the wordplay.
'chine' anagrams to 'NICHE'.
But, I'm not clear how this is indicated.
'of' is the link.
Can you help me to learn more?
(Other definitions for niche that I've seen before include "Particularly suitable position" , "Specialized market" , "Place that's cosy" , "Nook or recess" , "market area for specialists" .)