Day at wheel travelling round to act as guide (4,3,3)
I believe the answer is:
lead the way
'act as guide' is the definition.
(to lead the way for someone is to guide them)
'day at wheel travelling round' is the wordplay.
'travelling round' indicates anagramming the letters.
'day'+'at'+'wheel'='dayatwheel'
'dayatwheel' anagrammed gives 'LEAD THE WAY'.
'to' acts as a link.
(Other definitions for lead the way that I've seen before include "Act as a guide" , "Pioneer showing how" , "Go first and guide others" , "Go ahead" .)