Pet worn out in Gwent location (7)
I believe the answer is:
newport
'gwent location' is the definition.
'Newport' can be an answer for 'location' (Newport is an example). I'm unsure of the 'gwent' bit.
'pet worn out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'pet'+'worn'='petworn'
'petworn' with letters rearranged gives 'NEWPORT'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for newport that I've seen before include "- - , IOW or RI" , "City of south Wales" , "City of southeast Wales" , "Major IOW town" , "Welsh town" .)