Conveyance makes a brewer howl terribly (11)
I believe the answer is:
wheelbarrow
'conveyance' is the definition.
(wheelbarrow is a kind of conveyance)
'a brewer howl terribly' is the wordplay.
'terribly' is an anagram indicator.
'a'+'brewer'+'howl'='abrewerhowl'
'abrewerhowl' anagrammed gives 'WHEELBARROW'.
'makes' is the link.
(Other definitions for wheelbarrow that I've seen before include "Gardener's carrier" , "Gardening equipment" , "will carry weight" , "Garden cart" , "Type of handcart" .)