Pilots circling upland finding hero (8)

I believe the answer is:

achilles

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'hero' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

(Other definitions for achilles that I've seen before include "Greek hero of the Trojan War" , "Mythical hero, vulnerable only through his heel" , "Legendary Greek with bad heel" , "Weak-heel warrior" , "Mythical Greek warrior with a foot problem" .)

I've seen this clue in The Sun.

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