Seize and put right in the bag, excitedly (4)
I believe the answer is:
grab
'seize' is the definition.
(grabbing is a kind of seizing)
'put right in the bag excitedly' is the wordplay.
'put right' becomes 'r' (I've seen this in other clues).
'in the' is an insertion indicator.
'excitedly' is an anagram indicator.
'bag' anagrammed gives 'gab'.
'r' placed into 'gab' is 'GRAB'.
'and' acts as a link.
(Other definitions for grab that I've seen before include "Seize hold of" , "Brag about seizure" , "Take quickly" , "'Seize, snatch (4)'" , "interest" .)