To some extent bit odd, leggy — move unsteadily (6)
I believe the answer is:
toddle
'move unsteadily' is the definition.
(I've seen this in another clue)
'to some extent bit odd leggy' is the wordplay.
'to some extent' indicates a hidden word (I've seen 'extent of' mean this (I've seen this in other clues)).
'TODDLE' is hidden within 'bit odd leggy'.
(Other definitions for toddle that I've seen before include "Move like someone starting out on life" , "Walk uncertainly like infant" , "Walk unsteadily like a small child" , "Walk like a young child" , "Walk like baby" .)