Clan's symbol, mostly something carried (4)
I believe the answer is:
tote
'something carried' is the definition.
(as in a tote bag)
'clan's symbol mostly' is the wordplay.
'clan's symbol' becomes 'totem'.
'mostly' means to remove the last letter.
'totem' with its final letter taken away is 'TOTE'.
(Other definitions for tote that I've seen before include "Carry or shoulder" , "It takes bets for horse races" , "transport" , "Transfer" , "Form of betting: carry" .)