Bear market displays reserve (7)
I believe the answer is:
earmark
'reserve' is the definition.
(synonyms)
'bear market displays' is the wordplay.
'displays' says the answer is hidden in the clue (part of the clue displays the answer).
'EARMARK' is hidden within 'bear market'.
(Other definitions for earmark that I've seen before include "Designate for a specific purpose" , "Reserve for later use" , "Set specially aside" , "reserve for future use" , "It identifies the outcome" .)