Crossword Genius

Experts at cards? (4)

Ross

I believe the answer is:

aces

I believe this clue is a double definition.

'experts' is the first definition.
(ace is a kind of expert)

'cards?' is the second definition.
(ace is a kind of card)

'at' acts as a link.

(Other definitions for aces that I've seen before include "winning points" , "passes with flying colours in US" , "Champions" , "Experts (in their field)" , "They're high and low on cards" .)

I've seen this clue in The Sun.
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