Following the set way for meetings to keep minutes (3,5)
I believe the answer is:
pro forma
'following the set way' is the definition.
Both the answer and definition are adjectives. Maybe there's an association between them I don't understand?
'for meetings to keep minutes' is the wordplay.
'for' becomes 'pro' (as in being 'pro' something).
'meetings' becomes 'fora' (forum is a kind of meeting).
'to keep' indicates putting letters inside.
'minutes' becomes 'm' (common abbreviation).
'fora' going around 'm' is 'forma'.
'pro'+'forma'='PRO-FORMA'
Can you help me to learn more?
(Other definitions for pro forma that I've seen before include "Standard form" , "Invoice" , "in a prescribed manner" , "Standard document" , "Document to be filled in" .)