Not wobbly (6)
I believe the answer is:
stable
'not wobbly' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stable that I've seen before include "providing accommodation for Arabs, perhaps" , "Steady in the horse-house" , "Secure - fast - horses" , "'Firmly fixed, not moving (6)'" , "Steady - home for dobbin" .)