Searching for "Clean Bandit Rather Be 2014 FLAC exclusive" requires leaving the standard streaming ecosystem. You will not find this on Spotify, Apple Music, or Tidal (which likely offers a different master).
: Several FLAC-quality remix packs were released, featuring reworks by The Magician All About She
In January 2014, Beatport released a "Beatport Exclusive" extended mix that was 6 minutes long (compared to the 3:47 radio edit). This version had a longer instrumental intro and outro. By 2016, licensing issues with Jess Glynne’s label removed this extended mix from most stores. A of this specific extended cut is now considered "exclusive" and highly sought after on private torrent trackers and soulseek.