Waddled, not initially puzzled (6)
I believe the answer is:
addled
'puzzled' is the definition.
(I've seen this in another clue)
'waddled not initially' is the wordplay.
'not initially' means to remove the first letter.
'waddled' with its initial letter removed is 'ADDLED'.
(Other definitions for addled that I've seen before include "(Of an egg) went bad" , "became rotten" , "Scatterbrained like bad egg" , "Foolish or confused like bad egg" , "Completely confused" .)