Very busy getting ready for holiday (6)
I believe the answer is:
packed
'ready for holiday' is the definition.
(having suitcases packed)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for packed that I've seen before include "Placed clothes etc in suitcase" , "Enveloped" , "Crowded" , "Arranged clothes in suitcase for travelling" .)