Show the flag? (6)
I believe the answer is:
unfurl
This clue could be a double definition.
'show' is the first definition.
(thesaurus)
'flag?' is the second definition.
The answer and definition 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 can't see?
'the' is the link.
Can you help me to learn more?
(Other definitions for unfurl that I've seen before include "Let out (flag)" , "Open up (a flag, perhaps)" , "Allow (flag) to fly" , "Unroll, flag say" , "unwind" .)