Provide with flexibility (6)
I believe the answer is:
supply
This clue is a double definition.
'provide' is the first definition.
(I know that provide can be written as supply)
'with flexibility' is the second definition.
(in a supple way)
(Other definitions for supply that I've seen before include "Give" , "in flexible way" , "Stand-in teacher" , "Provide; flexibly" , "Contribute" .)