Sun always has fragmented darts coverage (7)
I believe the answer is:
daystar
'sun always' is the definition.
'daystar' can be an answer for 'sun' (I've seen this before). I am unsure of the 'always' bit.
'has fragmented darts coverage' is the wordplay.
'has' becomes 'ay' (I can't justify this - if you can you should give a lot more credence to this answer).
'fragmented' indicates an anagram.
'coverage' is an insertion indicator.
'darts' with letters rearranged gives 'dstar'.
'ay' placed inside 'dstar' is 'DAYSTAR'.
(Another definition for daystar that I've seen is " sun".)