Gives another autograph as one leaves the office (7)
I believe the answer is:
resigns
'leaves the office' is the definition.
The definition and answer can be both related to thinking as well as being verbs in their -s form.
Perhaps you can see an association between them that I don't see?
'gives another autograph as one' is the wordplay.
I cannot quite see how this works, but
'another' could be 're' (I've seen this in other clues) and 're' is found in the answer.
'autograph' could be 'sign' (I've seen this before) and 'sign' is located in the answer.
A single letter 's' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for resigns that I've seen before include "Gives up (a post)" , "abdicates" , "does the honourable thing" , "Leaves job voluntarily" .)