Jam accompanying a track started by Queen (8)
I believe the answer is:
quandary
'jam' is the definition.
(thesaurus)
'accompanying a track started by queen' is the wordplay.
'accompanying' becomes 'and' (and can mean with or accompanying).
'a track' becomes 'ary' (I can't justify this - if you can you should believe this answer much more).
'started by' is a charade indicator (letters next to each other).
'queen' becomes 'qu' (abbreviation for queen).
'and'+'ary'='andary'
'andary' put after 'qu' is 'QUANDARY'.
(Other definitions for quandary that I've seen before include "State of uncertainty as to action to take" , "Predicament - dilemma - uncertainty" , "Problem" , "awkward situation" , "State of perplexity in difficult situation" .)