Charles is seen around in fetters (6)
I believe the answer is:
chains
'fetters' is the definition.
(I've seen this in another clue)
'charles is seen around in' is the wordplay.
'charles' becomes 'Chas' (shortened form).
'is seen around' is an insertion indicator.
'chas' placed around 'in' is 'CHAINS'.
(Other definitions for chains that I've seen before include "Cash in for manacles and irons" , "Restraints; series" , "Fetters" , "Cash in (anag)" , "Metal ropes with links (6)" .)