Short of information? (4)

I believe the answer is:

info

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

'information?' is the definition.
(short for information)

'short of' is the wordplay.
'short' becomes 'inf' (I can't justify this - if you can you should give a lot more credence to this answer).
'of' becomes 'o''.
'inf'+'o'='INFO'

Can you help me to learn more?

(Other definitions for info that I've seen before include "Facts (abbr)" , "Gen (abbr)" , "News" , "counsel?" , "Data received and understood (abbr)" .)

I've seen this clue in The Mirror.

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