We British following horse and trap (6)
I believe the answer is:
cobweb
'trap' is the definition.
(cobweb is a kind of trap)
'we british following horse' is the wordplay.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'following' means one lot of letters go next to another.
'horse' becomes 'cob' (type of horse).
'we'+'b'='web'
'web' after 'cob' is 'COBWEB'.
'and' is the link.
(Other definitions for cobweb that I've seen before include "Spider's filament" , "Naturally spun network" , "Dust-covered network" , "Spider's creation" , "Spider's flytrap" .)