Inhibit weightwatcher? Not I (5)
I believe the answer is:
deter
'inhibit' is the definition.
(I've seen this in another clue)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for deter that I've seen before include "Discourage or prevent from doing something" , "Discourage or impede" , "Hinder, discourage" , "Warn off" , "Try to prevent" .)