For people of fashion, this comes with a small charge (6)
I believe the answer is:
proton
'this comes with a small charge' is the definition.
The definition suggests a singular noun which matches the answer.
'for people of fashion' is the wordplay.
'for' becomes 'pro' (as in being 'pro' something).
'people of fashion' becomes 'ton' ('the ton' could once mean fashionable society).
'pro'+'ton'='PROTON'
Can you help me to learn more?
(Other definitions for proton that I've seen before include "Particle in atoms" , "Nuclear particle with positive charge" , "Atomic constituent" , "Particle in atom nucleus" , "One charged" .)