Going to put them with an egg into the oven to cook (2,3,4)
I believe the answer is:
on the move
'going' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I can't see?
'them with an egg into the oven to cook' is the wordplay.
'with' is a charade indicator (letters next to each other).
'an egg' becomes 'o' (an 'o' resembles an egg).
'into' indicates putting letters inside.
'to cook' indicates an anagram.
'them'+'o'='themo'
'oven' is an anagram of 'onve'.
'themo' placed into 'onve' is 'ON THE MOVE'.
'to put' is the link.
Can you help me to learn more?
(Another definition for on the move that I've seen is " Travelling".)