Give a start (5)
I believe the answer is:
begin
This clue could be a double definition.
'give' is the first definition.
The definition and answer can be both related to change as well as being verbs in their base form.
Perhaps you can see a link between them that I don't see?
'a start' is the second definition.
(I know that start is a kind of begin)
Can you help me to learn more?
(Other definitions for begin that I've seen before include "Initiate" , "Commence" , "Clandestine, furtive" , "Launch" , "Get cracking" .)