You might say Jagger's behind metal track (11)
I believe the answer is:
silverstone
'metal track' is the definition.
'silverstone' can be an answer for 'track' (I've seen this before). I'm not sure about the 'metal' bit.
'you might say jagger's behind' is the wordplay.
'you might say' becomes 'silver' (I can't explain this - if you can you should believe this answer much more).
'jagger' becomes 'Stone' (Mick Jagger is one of the Rolling Stones).
'behind' means one lot of letters go next to another.
'silver'+'stone'='SILVERSTONE'
Can you help me to learn more?
(Other definitions for silverstone that I've seen before include "English race track" , "Northamptonshire motor-racing circuit" , "English motor racing circuit" , "place for motorists - with 24d" , "UK motor racing track" .)