Can be found in polar exploration (3)

I believe the answer is:

are

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'can be' is the definition.
'are' can be an answer for 'be' (I've seen this in another clue). I'm unsure of the 'can' bit.

'in polar exploration' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ARE' can be found hidden inside 'polar exploration'.

'found' acts as a link.

Can you help me to learn more?

(Other definitions for are that I've seen before include "live" , "(They/you/we) exist" , "is for more than one" , "(We/you/they) exist" , "(We/they/you) exist" .)

I've seen this clue in the Evening Standard.

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