Explorer's hut revealed a secret (10)

I believe the answer is:

shackleton

'explorer's' is the definition.
(Ernest Shackleton, 1874-1922)

'hut revealed a secret' is the wordplay.
'hut' becomes 'shack' (synonyms).
'revealed a secret' becomes 'let on' (as in letting on about a secret).
'shack'+'leton'='SHACKLETON'

(Other definitions for shackleton that I've seen before include "heroic figure" , "Sir Ernest -, Irish-born Antarctic explorer" , "Polar explorer" .)

I've seen this clue in The Guardian.

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