Baby with nappy not right wobbling about? (7)
I believe the answer is:
tottery
'wobbling about?' is the definition.
(tottering or wobbling)
'baby with nappy not right' is the wordplay.
'baby' becomes 'tot' (I've seen this before).
'with' is a charade indicator (letters next to each other).
'nappy' becomes 'terry' (terry is a type of nappy).
'not' suggests deleting specific letters.
'right' becomes 'r' (common abbreviation).
'terry' with 'r' removed is 'tery'.
'tot'+'tery'='TOTTERY'
(Other definitions for tottery that I've seen before include "Unstable on one's feet" , "Moving unsteadily" , "Likely to rock" , "Moving insecurely" , "Frail" .)