Competently (4)

I think it could be either:

well

ably

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

This is all the clue.

(Other definitions for well that I've seen before include "Cockpit" , "Very probably" , "Borehole" , "We shall" , "31 [SPRING]" .)

I've seen this clue in The Times, the Sydney Morning Herald, the Universal, The Star Tribune and The Mirror.

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