Crossword Genius

Whistle excessively strident, ultimately (4)

Ross

I believe the answer is:

toot

'whistle' is the definition.
(I've seen this in another clue)

'excessively strident ultimately' is the wordplay.
'excessively' becomes 'too' (to too great a degree).
'ultimately' suggests the final letters.
The last letter of 'strident' is 't'.
'too'+'t'='TOOT'

(Other definitions for toot that I've seen before include "Sound of a car horn" , "Do it on a flute" , "Briefly blow" , "Brief blast on a horn" , "Noise made by car horn" .)

I've seen this clue in The Times.
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