Expletive (9)

I think it could be either:

Which length description are you looking for?:

5-4

swearword

'expletive' is the definition.
(synonyms)

This is all the clue.

(Other definitions for swearword that I've seen before include "Oath" , "profanity" , "blast perhaps" .)

I've seen this clue in The Telegraph and The Times.

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