Mock name for the common herd (6)
I believe the answer is:
ragtag
'the common herd' is the definition.
('ragtag' can mean a disordered group)
'mock name' is the wordplay.
'mock' becomes 'rag' (ragging is a kind of mocking).
'name' becomes 'tag' (I've seen this in other clues).
'rag'+'tag'='RAGTAG'
'for' is the link.
(Other definitions for ragtag that I've seen before include "Common people, riff-raff - ...... and bobtail" , "Scruffy" , "Masses" , "Badly organised" , "Disorderly" .)