Silly mesh hot pants for a consumer of garments (7,4)
I believe the answer is:
clothes moth
'consumer of garments' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'silly mesh hot pants' is the wordplay.
'silly' becomes 'clot' (I can't justify this - if you can you should believe this answer much more).
'pants' is an anagram indicator (UK informal term for 'nonsense' or 'rubbish').
'mesh'+'hot'='meshhot'
'meshhot' is an anagram of 'hesmoth'.
'clot'+'hesmoth'='CLOTHES-MOTH'
'for a' acts as a link.
Can you help me to learn more?
(Other definitions for clothes moth that I've seen before include "Insect whose larvae destroy textiles" , "Textile muncher" , "Tineid" .)