After initial turmoil, plan to enter the branch gets cut short by the locks cleaner (7)
I believe the answer is:
shampoo
'cleaner' is the definition.
(shampoo is a kind of cleaner)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for shampoo that I've seen before include "Washing preparation (from Hindi)" , "Washer for locks" , "Apply liquid to hair ..." , "Liquid cleaner" , "Carpet/hair cleanser" .)