Anticipate no relaxation during trip (9)
I believe the answer is:
forestall
'anticipate' is the definition.
(I know that anticipate can be written as forestall)
'no relaxation during trip' is the wordplay.
'no' becomes 'O' (resembles 0 - 'no' can mean 'zero').
'relaxation' becomes 'rest' (synonyms).
'during' indicates putting letters inside.
'trip' becomes 'fall' (trip can mean to fall over).
'o'+'rest'='orest'
'orest' placed inside 'fall' is 'FORESTALL'.
(Other definitions for forestall that I've seen before include "Avert" , "Anticipate" , "Take action before" , "Stop" , "Hinder by anticipation" .)