Evaluate what to do after vacation (6)

I believe the answer is:
unpack
'evaluate' is the definition.
Although both the answer and definition are verbs in their base form, I can't see how they can define each other.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for unpack that I've seen before include "Remove from the wrapping" , "Empty (a suitcase)" , "Empty a case" , "Remove items from a suitcase" , "Analyse" .)
