Fit of temper in vehicle — seize travelling case (9)
I believe the answer is:
carpetbag
'travelling case' is the definition.
'fit of temper in vehicle seize' is the wordplay.
'fit of temper' becomes 'pet'.
'in' indicates putting letters inside.
'vehicle' becomes 'car' (car is a kind of vehicle).
'seize' becomes 'bag'.
'car'+'bag'='carbag'
'pet' going inside 'carbag' is 'CARPETBAG'.
(Other definitions for carpetbag that I've seen before include "Presumptuously seek success in a new locality - eg tap crab (anag)" , "Piece of luggage" .)