Briefly up to date, somewhat outmoded (3)

I believe the answer is:

mod

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

'briefly up to date' is the definition.
I can't tell whether this defines the answer.

'somewhat outmoded' is the wordplay.
'somewhat' indicates the answer is hidden within the clue.
'MOD' can be found hidden inside 'outmoded'.

Can you help me to learn more?

(Other definitions for mod that I've seen before include "1960s teenager" , "Meeting of the Scottish" , "Gaelic literary festival" , "ministry" , "Rocker's rival?" .)

I've seen this clue in the Evening Standard.

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