Stagger round for a bit of fun and get some more juice (6)
I believe the answer is:
refuel
'get some more juice' is the definition.
I can't tell whether this definition defines the answer.
'stagger round for a bit of fun' is the wordplay.
'stagger' becomes 'careen' ('careen' can be a synonym of 'stagger').
'round' means to look at the middle letters.
'for' is a charade indicator (letters next to each other).
'a bit of fun' becomes 'fuel' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The middle letters of 'careen' are 're'.
're'+'fuel'='REFUEL'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for refuel that I've seen before include "Fill with petrol again" , "Fill the tank again" , "Stoke up again" , "Fill up the tanks" .)