Those who draw attention to foul play: referees, perhaps? (7-7)

I believe the answer is:

whistle-blowers

I believe this is a double definition.

'those who draw attention to foul play' is the first definition.
(whistle-blowers highlight a problem)

'referees perhaps?' is the second definition.
(referees blow whistles)

I've seen this clue in The Telegraph.

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