Crossword Genius

Nick's not a companion (5)

Ross

I believe the answer is:

notch

'nick's' is the definition.
(both can mean a small cut or impression)

'not a companion' is the wordplay.
'a companion' becomes 'ch' (Companion of Honour).
'not'+'ch'='NOTCH'

(Other definitions for notch that I've seen before include "Indentation - step up" , "Secure" , "Indentation, nick" , "Nick - score" , "Dent" .)

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.