Get smart tree at university (6,2)

I believe the answer is:

spruce up

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'get smart' is the definition.
I can't judge whether this definition defines the answer.

'tree at university' is the wordplay.
'tree' becomes 'spruce' (spruce is a kind of tree).
'at university' becomes 'up' ('up' can mean studying at university).
'spruce'+'up'='SPRUCE UP'

Can you help me to learn more?

(Other definitions for spruce up that I've seen before include "Titivate" , "groom" , "Become smart" , "Make smarter" .)

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