Traveller's gear something funny to carry in toboggan (7)
I believe the answer is:
luggage
'traveller's gear' is the definition.
(traveller's cases)
'something funny to carry in toboggan' is the wordplay.
'something funny' becomes 'gag' (a joke).
'to carry' indicates putting letters inside.
'in toboggan' becomes 'luge' (synonyms. I am not sure about the 'in' bit.).
'gag' put inside 'luge' is 'LUGGAGE'.
Can you help me to learn more?
(Other definitions for luggage that I've seen before include "Traveller's bags etc" , "Suitcases and travelling bags" , "gear carried" , "case?" , "Trunks and cases of traveller" .)