Met to design emblem (5)
I believe the answer is:
totem
'emblem' is the definition.
(totem is a kind of emblem)
'met to design' is the wordplay.
'design' indicates anagramming the letters.
'met'+'to'='metto'
'metto' anagrammed gives 'TOTEM'.
(Other definitions for totem that I've seen before include "charming symbol, say" , "Emblem believed to have spiritual significance" , "Revered symbol" , "Symbolic pole" , "Object adopted by N American Indians as emblem" .)