What first-class fare gets the foreign newly-wed (7)
I believe the answer is:
legroom
'what first-class fare gets' is the definition.
(eg first-class on a train might have more legroom)
'the foreign newly-wed' is the wordplay.
'the foreign' becomes 'le' ('the' in French).
'newly-wed' becomes 'groom' (man who's just got married).
'le'+'groom'='LEGROOM'
(Other definitions for legroom that I've seen before include "Space between seat rows" , "Space in front of a seat" , "Space often lacking on a plane!" , "Space to stretch out when sitting" , "Space to stretch for seated person" .)