Divert attention from London-bound coach? (7)
I believe the answer is:
upstage
'divert attention from' is the definition.
(I've seen this before)
'london-bound coach?' is the wordplay.
'london-bound' becomes 'up' ('up' can mean at an important place, esp. London).
'coach?' becomes 'stage' (stagecoach**).
'up'+'stage'='UPSTAGE'
(Other definitions for upstage that I've seen before include "(Of actor) away from the audience" , "Try to attract attention" , "Stand-offish (sl.)" , "Take attention from (another actor)" , "aloof" .)