Slob finished talking about one new catalogue? (10)
I believe the answer is:
pigeonhole
'new catalogue?' is the definition.
The answer and definition can be both related to thinking as well as being verbs in their base form.
Maybe there's a link between them I don't understand?
'slob finished talking about one' is the wordplay.
I cannot really see how this works, but
'slob' could be 'pig' (synonyms) and 'pig' is located in the answer.
'about' could be 'on' (as in a book 'on' a certain topic) and 'on' is found in the answer.
'one' could be 'o' (I've seen this in other clues) and 'o' is present in the answer.
The remaining letters 'ehle' 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).
Can you help me to learn more?
(Other definitions for pigeonhole that I've seen before include "Recess in loft" , "Classify; bird's home" , "Categorise" , "wherein one may put post" .)