Keen to provide something for future growth (7)
I believe the answer is:
cutting
This clue is a double definition.
'keen' is the first definition.
(I know that keen can be written as cutting)
'something for future growth' is the second definition.
(plant cutting)
'to provide' acts as a link.
(Other definitions for cutting that I've seen before include "something for propagation" , "Excavation for road" , "Keen" , "Of a comment, pointed" , "crossing" .)