Crossword Genius

Advanced positions for card champions? (11)

Ross

I believe the answer is:

bridgeheads

I'm a little stuck... Click here to teach me more about this clue!

'advanced positions' is the definition.
'bridgeheads' can be an answer for 'positions' (bridgehead is a kind of position). I am unsure of the 'advanced' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

I've seen this clue in The Irish News.
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