Tree yielding a fir cone (7)
I believe the answer is:
conifer
'tree' is the definition.
(I know that conifer is a type of gymnospermous tree)
'yielding a fir cone' is the wordplay.
'yielding' indicates anagramming the letters.
'fir'+'cone'='fircone'
'fircone' with letters rearranged gives 'CONIFER'.
(Other definitions for conifer that I've seen before include "Tree such as pine, yew etc" , "E.g. yew, pine or fir" , "The tree doesn't lose its leaves" , "one branching out" , "Evergreen (generally)" .)