Question: in France, who's heading for Zermatt? (4)
I believe the answer is:
quiz
'question' is the definition.
(thesaurus)
'france who's heading for zermatt?' is the wordplay.
'france who' becomes 'qui'.
'heading for' indicates taking the first letters.
The initial letter of 'zermatt' is 'z'.
'qui'+'z'='QUIZ'
'in' is the link.
(Other definitions for quiz that I've seen before include "General knowledge contest" , "Fun test" , "Distinctive smell" , "Test consisting of short questions" , "Pump" .)