Street band in series (6)
I believe the answer is:
string
'series' is the definition.
(string is a kind of series)
'street band' is the wordplay.
'street' becomes 'st'.
'band' becomes 'ring' ('ring' can be a synonym of 'band').
'st'+'ring'='STRING'
'in' acts as a link.
(Other definitions for string that I've seen before include "Cord, strand, thread" , "Suspend" , "Sequence; cord" , "It's difficult to say how long a piece of it is" , "Violin wire" .)