Guide to form true with these (9)
I believe the answer is:
usherette
'guide' is the definition.
(usherette is a kind of guide)
'form true with these' is the wordplay.
'form' indicates anagramming the letters.
'with' says to put letters next to each other.
'true'+'these'='truethese'
'truethese' anagrammed gives 'USHERETTE'.
'to' is the link.
(Other definitions for usherette that I've seen before include "Lady who shows you to your seat in cinema or theatre" , "Person showing people to their seats" , "Cinema employee" , "She shows people to seats" , "Cinema attendant" .)