Put plum in packet in suitcases (7)
I believe the answer is:
baggage
'packet in suitcases' is the definition.
'baggage' can be an answer for 'suitcases' (I've seen this before). I'm unsure of the 'packet in' bit.
'put plum' is the wordplay.
'put' becomes 'bag' (I can't justify this - if you can you should give a lot more credence to this answer).
'plum' becomes 'gage' (I've seen this in another clue).
'bag'+'gage'='BAGGAGE'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for baggage that I've seen before include "Immoral woman" , "belongings" , "Suitcases; encumbrances" , "something carried over from the past?" , "that has been packed for the journey" .)