Crate rerouted after deliveries go too far (9)
I believe the answer is:
overreact
'go too far' is the definition.
(thesaurus)
'crate rerouted after deliveries' is the wordplay.
'rerouted' is an anagram indicator (I've seen this in other clues).
'after' says to put letters next to each other.
'deliveries' becomes 'over' (I've seen this before).
'crate' anagrammed gives 'react'.
'react' put after 'over' is 'OVERREACT'.
(Other definitions for overreact that I've seen before include "Respond too much" , "Make much ado about nothing" , "Respond excessively" , "Fuss too much" , "Respond too strongly" .)