Was it never a good match? (7)
I believe the answer is:
lucifer
'match?' is the definition.
(I know that match can be written as lucifer)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for lucifer that I've seen before include "the adversary" , "Devil - match!" , "from the abyss?" , "Satan, Son of the Morning" , "flares up when struck" .)