Plant originally lacking in parts of Dordogne? (9)
I believe the answer is:
goldenrod
'plant' is the definition.
The answer is an example.
'originally lacking in parts of dordogne?' is the wordplay.
'originally' indicates taking the first letters.
'in' means one lot of letters goes inside another.
'parts of' indicates anagramming the letters.
The first letter of 'lacking' is 'l'.
'dordogne' is an anagram of 'godenrod'.
'l' placed within 'godenrod' is 'GOLDENROD'.
(Other definitions for goldenrod that I've seen before include "Yellow-flowered plant" , "Yellow-spiked garden flower" , "bloomer" , "Autumnal flower" , "Autumnal plant" .)