Slow and unsteady (7)
I believe the answer is:
doddery
'slow and unsteady' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for doddery that I've seen before include "Unsteady in movement" , "Shaky" , "Old and feeble" , "Slow and unsteady" , "Rather senile" .)