Goes off seat, second to last (6)
I believe the answer is:
addles
'goes' is the definition.
The definition and answer can be both related to change as well as being verbs in their -s form.
Maybe they are linked in a way I don't understand?
'seat second to last' is the wordplay.
I cannot really understand how this works, but
'second' could be 's' (common abbreviation) and 's' is present in the answer.
The remaining letters 'addle' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'off' acts as a link.
Can you help me to learn more?
(Other definitions for addles that I've seen before include "Confuses like bad egg" , "Makes rotten - makes muddled" , "Muddles, confuses" , "Confuses or goes bad" , "Confuses in saddle" .)