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Results in onset of sweat possibly? (10)

Ross

I believe the answer is:

sultriness

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'results in onset of sweat possibly?' is the definition.
I can't tell whether this defines the answer.

'results in onset of sweat possibly?' is the wordplay.
'onset of' suggests taking the first letters.
'possibly?' indicates anagramming the letters (I've seen 'possibly' mean this).
The first letter of 'sweat' is 's'.
'results'+'in'+'s'='resultsins'
'resultsins' anagrammed gives 'SULTRINESS'.

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I've seen this clue in The Telegraph.
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