Most vulgar pastiche apes toffee-nosed hosts (8)
I believe the answer is:
cheapest
'most vulgar' is the definition.
('cheap' can be a synonym of 'vulgar')
'pastiche apes toffee-nosed hosts' is the wordplay.
'hosts' indicates the answer is hidden within the clue.
'CHEAPEST' is hidden in the letters of 'pastiche apes toffee nosed'.
(Other definitions for cheapest that I've seen before include "The space (anag.)" , "Set peach in least expensive category" , "It's most shameful" , "Most economical" , "Most cut-price" .)