Maybe stalls Tessa unduly (5)
I believe the answer is:
seats
'maybe stalls' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'tessa unduly' is the wordplay.
'tessa' can be anagrammed to 'SEATS'.
However, I am unsure how this is indicated.
Can you help me to learn more?
(Other definitions for seats that I've seen before include "Parliamentary constituencies" , "Chairs, stools" .)