Provider, not one to offer more elastic (7)
I believe the answer is:
suppler
'provider not one to offer more' is the definition.
I can't tell whether this definition defines the answer.
'elastic' is the wordplay.
I cannot quite understand how this works, but
'elastic' could be 'supple' (I've seen this in another clue) and 'supple' is located in the answer.
A single letter 'r' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for suppler that I've seen before include "More flexible" , "more plastic" .)