Rocket delayed after case redesigned (8)
I believe the answer is:
escalate
'rocket' is the definition.
(both can mean to increase or go up)
'delayed after case redesigned' is the wordplay.
'delayed' becomes 'late' (I've seen this before).
'after' means one lot of letters go next to another.
'redesigned' indicates anagramming the letters.
'case' is an anagram of 'esca'.
'late' after 'esca' is 'ESCALATE'.
(Other definitions for escalate that I've seen before include "mushroom" , "Amplify" , "Quickly increase in scale" , "Rapidly increase in intensity" , "Ramp up" .)