Duck — explorer (5)

I believe the answer is:

drake

I believe this clue is a double definition.

'duck' is the first definition.
(drake is a male duck)

'explorer' is the second definition.
(I know that Drake is a navigator)

(Other definitions for drake that I've seen before include "Male water-bird" , "Nick" , "Elizabethan sailor" , "sea captain" , "world traveller" .)

I've seen this clue in The Guardian.

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