All round, it's less than exorbitant (5)
I believe the answer is:
orbit
'all round' is the definition.
'orbit' can be an answer for 'round' (I've seen this before). I am unsure of the 'all' bit.
'less than exorbitant' is the wordplay.
'less' says the answer is hidden in the clue (the clue less some of the letters in it).
'ORBIT' is hidden in the letters of 'than exorbitant'.
'it's' is the link.
Can you help me to learn more?
(Other definitions for orbit that I've seen before include "Path eg of heavenly body" , "E.g. planetary movement" , "Path of one celestial body around another" , "Revolve around" , "Area of influence - eye socket" .)