While a coil fixed, detached (7)
I believe the answer is:
asocial
'detached' is the definition.
'while a coil fixed' is the wordplay.
'while' becomes 'as'.
'fixed' indicates anagramming the letters.
'a'+'coil'='acoil'
'acoil' is an anagram of 'ocial'.
'as'+'ocial'='ASOCIAL'
(Other definitions for asocial that I've seen before include "lacking friendly instincts" , "Inconsiderate to others" , "cold" , "not connected with community" , "Not fond of company, perhaps inconsiderate" .)