Men dividing a part somehow in accordance with a certain percentage
I believe the answer is:
pro rata
'accordance with a certain percentage' is the definition.
I can't judge whether this defines the answer.
'men dividing a part somehow' is the wordplay.
'men' becomes 'or' (I've seen this in other clues).
'dividing' indicates putting letters inside.
'somehow' indicates anagramming the letters.
'a'+'part'='apart'
'apart' anagrammed gives 'prata'.
'or' placed into 'prata' is 'PRO RATA'.
'in' is the link.
Can you help me to learn more?
(Other definitions for pro rata that I've seen before include "fairly divided" , "In proportion (Latin)" , "Proportionately based" , "Proportional, according to the rate" , "maintaining correspondence" .)