Is fling with hunk at work having unrealistic desires? (7,8)

I believe the answer is:

wishful thinking

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'having unrealistic desires?' is the definition.
I can't tell whether this definition defines the answer.

'is fling with hunk at work' is the wordplay.
'at work' indicates an anagram.
'is'+'fling'+'with'+'hunk'='isflingwithhunk'
'isflingwithhunk' with letters rearranged gives 'WISHFUL THINKING'.

Can you help me to learn more?

(Other definitions for wishful thinking that I've seen before include "pure fantasy" , "over-optimistic expectation" .)

I've seen this clue in The Guardian.

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