Crossword Genius

A setter is showing intent (3)

Ross

I believe the answer is:

aim

'intent' is the definition.
(synonyms)

'a setter is' is the wordplay.
'setter is' becomes 'im' (the setter is the person who set the crossword).
'a'+'im'='AIM'

'showing' is the link.

(Other definitions for aim that I've seen before include "Train" , "Purpose, intention" , "Direct, intend" , "Aspire" , "Point (a camera)" .)

I've seen this clue in The Sun.
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