Crossword Genius

Tom telephones expressing disapproval (8)

Ross

I believe the answer is:

catcalls

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'expressing disapproval' is the definition.
I can't judge whether this defines the answer.

'tom telephones' is the wordplay.
'tom' becomes 'cat' (a tom is a male cat).
'telephones' becomes 'calls' ('call' can be a synonym of 'telephone').
'cat'+'calls'='CATCALLS'

Can you help me to learn more?

(Other definitions for catcalls that I've seen before include "Shrill disapproving whistles of feline origin" , "Shrill whistles of disapproval - feline?" , "Derisive shouts" .)

I've seen this clue in The Globe and Mail.
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