A standard spare part (3)

I believe the answer is:

par

'a standard' is the definition.
(I've seen this before)

'spare part' is the wordplay.
'part' indicates a hidden word.
'PAR' can be found hidden inside 'spare'.

(Other definitions for par that I've seen before include "Normal golfing score" , "Median" , "Target score (golf)" , "Average score for good golf player" , "Standard number of strokes for a golf-hole" .)

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.