Wobbling for an instant (6)
I believe the answer is:
ashake
'wobbling' is the definition.
Both the answer and definition are adjectives.
Maybe they are linked in a way I don't understand?
'an instant' is the wordplay.
I cannot really understand how this works, but
'an' could be 'a' and 'a' is present in the answer.
The remaining letters 'shake' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'for' is the link.
Can you help me to learn more?
(Other definitions for ashake that I've seen before include "Trembling" , "Vibrating" .)