Symbol of bear market's origin (5)
I believe the answer is:
totem
'symbol' is the definition.
(thesaurus)
'bear market's origin' is the wordplay.
'bear' becomes 'tote' (I've seen this before).
'origin' indicates taking the first letters.
The first letter of 'markets' is 'm'.
'tote'+'m'='TOTEM'
'of' is the link.
(Other definitions for totem that I've seen before include "Symbol, emblem" , "Pole used in ritual" , "charming symbol, say" , "Symbolic pole" , "symbolic animal" .)