Support raised again (6)

I believe the answer is:

backup

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

'support raised again' is the definition.
I can't judge whether this defines the answer.

'support raised' is the wordplay.
'support' becomes 'back' (to back is to support or endorse).
'raised' becomes 'up' (similar in meaning).
'back'+'up'='BACKUP'

Can you help me to learn more?

(Another definition for backup that I've seen is " Reserve".)

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