A stand of a strange new sort is brought in (7)
I believe the answer is:
rostrum
'a stand' is the definition.
(thesaurus)
'strange new sort is brought in' is the wordplay.
'strange' becomes 'rum' (synonyms).
'new' indicates anagramming the letters.
'is brought in' is an insertion indicator.
'sort' with letters rearranged gives 'ostr'.
'rum' placed around 'ostr' is 'ROSTRUM'.
'of a' acts as a link.
(Other definitions for rostrum that I've seen before include "Platform for public speaking" , "beak" , "Podium" , "Rum rots (anag)" , "stage" .)