Merseyside port good for pirate (7)
I believe the answer is:
bootleg
'pirate' is the definition.
The answer and definition can be both to do with ownership as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'merseyside port good' is the wordplay.
'merseyside port' becomes 'bootle'.
'good' becomes 'g' (abbreviation).
'bootle'+'g'='BOOTLEG'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for bootleg that I've seen before include "Illegal music recording" , "Illicit (liquor?)" , "Deal in illicit alcohol" , "Illegally made recordings" , "Distributed illegally" .)