More and more anglers in icy waves (12)

I believe the answer is:

increasingly

'more and more' is the definition.
('increasingly' can be a synonym of 'more and more')

'anglers in icy waves' is the wordplay.
'waves' is an anagram indicator.
'anglers'+'in'+'icy'='anglersinicy'
'anglersinicy' is an anagram of 'INCREASINGLY'.

(Another definition for increasingly that I've seen is " More and more".)

I've seen this clue in The Telegraph.

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