Firstly, all those extra unwanted parcels put away (3,2)
I believe the answer is:
ate up
'away' is the definition.
The answer and definition are not the same part of speech. However, past participle verbs and adjectives sometimes define each other.
'firstly all those extra unwanted parcels' is the wordplay.
'firstly' suggests taking the first letters.
The initial letters of 'all those extra unwanted parcels' is 'ATE UP'.
'put' is the link.
Can you help me to learn more?
(Other definitions for ate up that I've seen before include "Absorbed" , "Squandered" , "preoccupied" .)