Wobbling for an instant (6)
I believe the answer is:
ashake
'wobbling' is the definition.
Both the answer and definition are adjectives.
Maybe you can see a link between them that I can't see?
'an instant' is the wordplay.
I cannot quite understand how this works, but
'an' could be 'a' and 'a' is found in the answer.
The remaining letters 'shake' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'for' is the link.
Can you help me to learn more?
(Other definitions for ashake that I've seen before include "Trembling" , "Vibrating" .)