Disgusting yobs upsetting kindly Kent youths at first (5)

I believe the answer is:

yukky

'disgusting' is the definition.
(yukky can informally mean disgusting)

'yobs upsetting kindly kent youths at first' is the wordplay.
'at first' says to take the initial letters.
The initial letters of 'yobs upsetting kindly kent youths' is 'YUKKY'.

(Another definition for yukky that I've seen is " extremely unappealing".)

I've seen this clue in The Times.

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