Pen stand? (5)
I believe the answer is:
stall
I believe this is a double definition.
'pen' is the first definition.
(thesaurus)
'stand?' is the second definition.
('stall' can be a synonym of 'stand')
(Other definitions for stall that I've seen before include "Box" , "Theatre seat" , "Animal compartment" , "facility for trade" , "Come to a halt" .)