Initially feels resentment over woman’s nasty show of dislike (5)

I believe the answer is:

frown

'show of dislike' is the definition.
(a frown indicates displeasure)

'initially feels resentment over woman's nasty' is the wordplay.
'initially' indicates taking the first letters.
The initial letters of 'feels resentment over womans nasty' is 'FROWN'.

(Other definitions for frown that I've seen before include "gloomy expression" , "Look displeased" , "Wrinkling of forehead" , "Glower" , "Furrow one's brow" .)

I've seen this clue in The Times.

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