Gathers dust? (6,2)
'gathers' is the definition.
The definition and answer can be both related to thinking as well as being verbs in their -s form.
Maybe there's a link between them I don't understand?
'dust?' is the wordplay.
I cannot quite understand how this works, but
'dust?' could be 'sweep' (I've seen this before) and 'sweep' is present in the answer.
The remaining letters 'sup' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gathers dust</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sits that I've seen before include "Is in session" , "Takes a chair" , "Perches" , "Poses for portrait" , "Takes a seat for the painter" .)