It may require an answer. That's the difficulty (7)

I believe the answer is:

problem

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'the difficulty' is the definition.
(problem is a kind of difficulty)

I don't understand the remainder of the clue.

(Other definitions for problem that I've seen before include "Quandary or dilemma" , "Something to be solved" , "Trouble" , "Something that needs solving" , "Brainteaser" .)

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

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