Street band in sequence (6)
I believe the answer is:
string
'sequence' is the definition.
(thesaurus)
'street band' is the wordplay.
'street' becomes 'st'.
'band' becomes 'ring' ('ring' can be a synonym of 'band').
'st'+'ring'='STRING'
'in' is the link.
(Other definitions for string that I've seen before include "Piece of catgut stretched on violin" , "Thread; sequence" , "might one be plucked?" , "Thin length of cord etc" , "groups of horses" .)