Train's, strangely true, on time (9)
I believe the answer is:
entourage
'train's' is the definition.
(thesaurus)
'strangely true on time' is the wordplay.
'strangely' indicates an anagram.
'time' becomes 'age' (age is a kind of time).
'true'+'on'='trueon'
'trueon' anagrammed gives 'entour'.
'entour'+'age'='ENTOURAGE'
(Other definitions for entourage that I've seen before include "Staff" , "Group of followers" , "train" , "company" , "Retinue, cortege" .)