Great escape for Shatter on holiday
I believe the answer is:
break out
'great escape' is the definition.
'break out' can be an answer for 'escape' (I've seen this before). I am not certain of the 'great' bit.
'shatter on holiday' is the wordplay.
'shatter' becomes 'break' (I've seen this before).
'on holiday' becomes 'out' (I can't justify this - if you can you should believe this answer much more).
'break'+'out'='breakout'
'for' is the link.
Can you help me to learn more?
(Other definitions for break out that I've seen before include "Start suddenly; escape (from prison)" , "Appear suddenly - escape" , "Escape from jail" .)