Carrier crowd set on fire (8)
I believe the answer is:
rucksack
'carrier' is the definition.
(something which carries things)
'crowd set on fire' is the wordplay.
'crowd' becomes 'ruck' (I've seen this in another clue).
'set on' is a charade indicator (letters next to each other).
'fire' becomes 'sack' (dismiss someone from their job).
'ruck'+'sack'='RUCKSACK'
(Other definitions for rucksack that I've seen before include "part of hiker's gear" , "Back carrier" , "Bergen?" , "Trekker's baggage" , "Trekker's luggage" .)