He's unwilling to give credit (7)

I believe the answer is:

sceptic

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'he's unwilling to give credit' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

This is the entire clue.

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(Other definitions for sceptic that I've seen before include "One who doubts the truth of religions" , "I may doubt that" , "Doubter; atheist" , "Thomas for one" , "A doubting Thomas" .)

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

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