Crossword Genius

Wave altered and hit bluff (4,6)


I believe the answer is:

idle threat

'bluff' is the definition.
(an idle threat is a bluff)

'wave altered and hit' is the wordplay.
'wave' indicates an anagram (I've seen 'waving' mean this (letters wave around)).
'and' is a charade indicator (letters next to each other).
'altered' after 'hit' is 'hitaltered'.
'hitaltered' is an anagram of 'IDLE THREAT'.

(Another definition for idle threat that I've seen is " Unconvincing menace".)

I've seen this clue in The Guardian.
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