What does the cryptic crossword clue "Positioned in the middle, say, it’s quiet and different (11)" mean?

The wordplay uses an anagram. anagram of IT’S + QUIET + AND = EQUIDISTANT The answer is EQUIDISTANT.

Positioned in the middle, say, it’s quiet and different (11)

Daily Mail Cryptic #16320 | 29 Across | 2020-05-21 flower