Maybe film exotic vale route, Greece’s first? (10)
I believe the answer is:
travelogue
'maybe film' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'exotic vale route greece's first?' is the wordplay.
'exotic' indicates an anagram (an unusual form of the letters).
'greece's first?' becomes 'g' (1st letter of 'greece').
'vale'+'route'+'g'='valerouteg'
'valerouteg' is an anagram of 'TRAVELOGUE'.
Can you help me to learn more?
(Other definitions for travelogue that I've seen before include "Book, film, etc about visiting foreign parts" , "Book about wanderings" .)