All right we'll drop the apostrophe (4)

I believe the answer is:

well

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'all right' is the definition.
(synonyms)

I can't explain the rest of the clue.

(Other definitions for well that I've seen before include "Source of oil - healthy - goodness!" , "Extremely; plentiful supply" , "Fine - drilled hole" , "and 24: Almost" , "Flood - thoroughly" .)

I've seen this clue in The Globe and Mail.

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