Own clothing line is cut by 50% (5)
I believe the answer is:
halve
'cut by 50%' is the definition.
I can't tell whether this definition defines the answer.
'own clothing line' is the wordplay.
'own' becomes 'have' (synonyms).
'clothing' means one lot of letters goes inside another (some letters cover up or clothe others).
'line' becomes 'l' (used when specifying particular lines from a poem).
'have' enclosing 'l' is 'HALVE'.
'is' is the link.
Can you help me to learn more?
(Other definitions for halve that I've seen before include "Share equally" , "Bisect" , "split with another" , "Cut into two equal portions" , "cut by fifty percent" .)