Skill in a particular field (7)

I believe the answer is:

prowess

'skill in a particular field' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for prowess that I've seen before include "Skill, expertise; bravery" , "Great ability or daring" , "Bravery in battle" , "Accomplishment" , "Acquired skill(s)" .)

I've seen this clue in The Guardian, the Irish Times (Simplex) and The Irish Times.

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