Sticklers replanned US trips (7)
I believe the answer is:
purists
'sticklers' is the definition.
(I've seen this in another clue)
'replanned us trips' is the wordplay.
'us trips' can be anagrammed to 'PURISTS'.
However, I am unsure how this is indicated.
Can you help me to learn more?
(Other definitions for purists that I've seen before include "pedants" , "Sticklers for traditional rules" , "Pedantic folk" , "fastidious types" .)