Optimism (4)

I think it could be either:

hope

help

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

This is all the clue.

(Other definitions for hope that I've seen before include "Optimism - English-born US comedian" , "Expect and wish" , "Feeling of expectant desire" , "Bob --, US comic" , "Trust" .)

I've seen this clue in The Daily Mail, the Penny Press, The Times, the Evening Standard and The Mirror.

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