One paying attention to line from wrong entries (8)
I believe the answer is:
listener
'one paying attention' is the definition.
(I've seen this before)
'line from wrong entries' is the wordplay.
'line' becomes 'l' (used when specifying particular lines from a poem).
'from' means one lot of letters go next to another.
'wrong' is an anagram indicator.
'entries' is an anagram of 'istener'.
'l'+'istener'='LISTENER'
'to' acts as a link.
(Other definitions for listener that I've seen before include "Radio fan" , "One hearing" , "One paying attention" , "One who hears" , "one should be able to hear it" .)