Somehow got bag on sledge (8)
I believe the answer is:
toboggan
'sledge' is the definition.
(toboggan is a kind of sledge)
'somehow got bag on' is the wordplay.
'somehow' is an anagram indicator.
'got'+'bag'+'on'='gotbagon'
'gotbagon' with letters rearranged gives 'TOBOGGAN'.
(Other definitions for toboggan that I've seen before include "Long narrow sled" , "Sled with boards curved up in front" , "Snow vehicle" , "Travel in it" , "Sliding vehicle" .)