Crossword Genius

Questionable brief moment when Juliet wanders away (4)

Ross

I believe the answer is:

iffy

I'm a little stuck... Click here to teach me more about this clue!

'questionable' is the definition.
(I've seen this in another clue)

'brief moment when juliet wanders away' is the wordplay.
I cannot really understand how this works, but
'when' could be 'if' and 'if' is present in the answer.
The remaining letters 'fy' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for iffy that I've seen before include "not kosher" , "Dubious (colloq.)" , "Uncertain (colloq.)" , "Informally dubious or uncertain" , "Questionable (inf)" .)

I've seen this clue in The Independent.
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