Go over to contrary assistant when professional accountant returns to hotel (8)
I believe the answer is:
approach
'go' is the definition.
(thesaurus)
'professional accountant returns to hotel' is the wordplay.
'professional' becomes 'appro' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'accountant' becomes 'CA' (abbreviation for chartered accountant).
'returns' says the letters should be written in reverse.
'to hotel' becomes 'h' (phonetic alphabet).
'ca' written backwards gives 'ac'.
'appro'+'ac'+'h'='APPROACH'
'over to contrary assistant when' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for approach that I've seen before include "Move towards" , "driveway" , "Avenue" , "Come near - means of access" , "Come closer" .)