Lovely first person, by the sound of it, arresting (3-8)
I believe the answer is:
'lovely' is the definition.
(both can mean attractive)
'first person by the sound of it arresting' is the wordplay.
'first person' becomes 'I' (first-person pronoun).
'by the sound of it' indicates a 'sounds like' (homophone) clue.
'arresting' becomes 'catching' ('catch' can be a synonym of 'arrest').
'i' sounds like 'eye'.
(Other definitions for eye-catching that I've seen before include "Seizing one's attention", "Attractive", "Attracting attention", "Conspicuous", "Striking".)