Just for the moment, I’m leaving Jim uncertain (5)

I believe the answer is:

jiffy

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

'just for the moment' is the definition.
I can't tell whether this definition defines the answer.

'i'm leaving jim uncertain' is the wordplay.
'leaving' is a deletion indicator.
'uncertain' becomes 'iffy' ('iffy' can be similar in meaning to 'uncertain').
'jim' with 'im' taken away is 'j'.
'j'+'iffy'='JIFFY'

Can you help me to learn more?

(Other definitions for jiffy that I've seen before include "Very short moment - type of bag" , "Moment (slang)" , "An instant" , "Two shakes of a lamb's tail?" , "Split second" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app