Host with piece of cake and cocktail (3,6)
I believe the answer is:
sea breeze
'cocktail' is the definition.
(I've seen this before)
'host with piece of cake' is the wordplay.
'host' becomes 'sea' (I've seen this in another clue).
'with' says to put letters next to each other.
'piece of cake' becomes 'breeze' (I've seen this before).
'sea'+'breeze'='SEA-BREEZE'
'and' is the link.
(Other definitions for sea breeze that I've seen before include "Gentle wind from the ocean" , "Onshore wind; cocktail" , "Maritime wind" , "Vodka-based cocktail" , "that creates a cool ambience around 6 [ISLE] ?" .)