Met to devise emblem (5)
I believe the answer is:
totem
'emblem' is the definition.
(I know that totem is a type of emblem)
'met to devise' is the wordplay.
'devise' indicates an anagram (I've seen 'devised' mean this).
'met'+'to'='metto'
'metto' anagrammed gives 'TOTEM'.
(Other definitions for totem that I've seen before include "Pole used in ritual" , "Animal as clan symbol" , "Natural object carved on poles by North American Indians" , "symbol representing clan" , "Venerated emblem" .)