Card game the French see making a comeback in campaigning politician's itinerary (7-5)

'campaigning politician's itinerary' is the definition.
(as in a whistle-stop tour)

'card game the french see making a comeback' is the wordplay.
'card game' becomes 'whist' (whist is a kind of card game**).
'the french' becomes 'les' (les is the in french).
'see' becomes 'spot' (I've seen this before).
'making a comeback' says the letters should be written backwards.
'spot' back-to-front is 'tops'.
'whist'+'les'+'tops'='WHISTLE-STOPS'

'in' acts as a link.