Arrive all over to regain consciousness (4,5)
I believe the answer is:
come round
'to regain consciousness' is the definition.
(I've seen this before)
'arrive all' is the wordplay.
'arrive' becomes 'come' (synonyms).
'all' becomes 'round' (I am not sure about this - if you are sure you should believe this answer much more).
'come'+'round'='COME-ROUND'
'over' is the link.
Can you help me to learn more?
(Other definitions for come round that I've seen before include "Be persuaded" , "call" , "Recover consciousness" , "as someone who's been out may do" , "Regain consciousness" .)