Brief stop for many in a trance (5)
I believe the answer is:
comma
'brief stop' is the definition.
(I've seen this before)
'many in a trance' is the wordplay.
'many' becomes 'm' (Roman numeral for a thousand).
'in' indicates putting letters inside.
'a trance' becomes 'coma' (I have seen 'Deep trance' mean 'coma' so perhaps 'trance' could also mean 'coma').
'm' going into 'coma' is 'COMMA'.
'for' is the link.
(Other definitions for comma that I've seen before include "identifying place to breathe" , "Short break" , ", (stet)" , "Butterfly with orange and brown wings" , "Kind of butterfly" .)