Tree from Cardinal de Retz (5)
I believe the answer is:
alder
'tree' is the definition.
(I know that alder is a type of tree)
'from cardinal de retz' is the wordplay.
'from' says the answer is hidden in the clue.
'ALDER' is hidden within 'cardinal de retz'.
(Other definitions for alder that I've seen before include "One [TYPE OF TREE]" , "Tree or shrub of the birch family" , "Shrub or tree with cone-like fruits" , "Native tree" , "Tree akin to the birch" .)