Cool bit in excellent EP identified (5)
I believe the answer is:
tepid
'cool' is the definition.
(thesaurus)
'bit in excellent ep identified' is the wordplay.
'bit' indicates a hidden word (I've seen 'bit of' mean this).
'TEPID' can be found hidden inside 'in excellent ep identified'.
(Other definitions for tepid that I've seen before include "Showing little interest or enthusiasm" , "lacking enthusiasm" , "Slightly warm" , "Unenthusiastic - cool" , "What's a bit warm" .)