Approach half-cut Canadian - this might make him laugh. (8)
I believe the answer is:
comedian
'this might make him laugh' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'approach half-cut canadian' is the wordplay.
'approach' becomes 'come' (e.g. as imperative).
'half cut' indicates taking half.
'canadian' cut in half is 'dian'.
'come'+'dian'='COMEDIAN'
Can you help me to learn more?
(Other definitions for comedian that I've seen before include "Funny entertainer" , "Comic" , "Hope, perhaps" , "cracking bloke?" , "Hope, say" .)