Waded, not initially puzzled (6)
I believe the answer is:
addled
'puzzled' is the definition.
(thesaurus)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for addled that I've seen before include "Befuddled" , "Confused, mixed up like bad egg" , "Of egg, rotten and producing no chick" , "Mentally confused, muddled" , "Lost" .)