Swagger when changing ends, creating interest (4)
I believe the answer is:
grab
This clue might be a double definition.
'swagger when changing ends' is the first definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'interest' is the second definition.
(I know that grab is a more specific form of the action fascinate)
'creating' acts as a link.
(Other definitions for grab that I've seen before include "Seize roughly" , "Seize rudely" , "Brag about seizure" , "Seize hold of" , "Grasp roughly" .)