Crossword Genius

Was Catherine a standard redhead? (4)

Ross

I believe the answer is:

parr

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'was catherine a' is the definition.
I can't judge whether this definition defines the answer.

'standard redhead?' is the wordplay.
'standard' becomes 'par' (standard of play in golf).
'redhead?' becomes 'r' (the head/first letter of 'red').
'par'+'r'='PARR'

Can you help me to learn more?

(Other definitions for parr that I've seen before include "survivor of the decapitator?" , "Fish" , "old trout?" , "Catherine ---, Henry VIII's widow" , "Wife surviving" .)

I've seen this clue in the Evening Standard.
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