Crossword Genius

Whistle-blower in Hereford (3)

Ross

I believe the answer is:

ref

'whistle-blower' is the definition.
(referees blow whistles)

'in hereford' is the wordplay.
'in' indicates a hidden word.
'REF' can be found hidden inside 'hereford'.

(Other definitions for ref that I've seen before include "Football official (colloq.)" , "Whistleblower (abbr)" , "A diminutive umpire in soccer or boxing" , "One traditionally in black" , "In brief, a soccer controller" .)

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