Right work among collected writings for man’s study? (12)
I believe the answer is:
anthropology
'man's study?' is the definition.
(study of humanity)
'right work among collected writings' is the wordplay.
'right' becomes 'r' (common abbreviation).
'work' becomes 'op' (abbreviation for opus).
'among' means one lot of letters goes inside another (inserted letters are placed among others).
'collected writings' becomes 'anthology' (an anthology is a collection of writings).
'r'+'op'='rop'
'rop' inserted within 'anthology' is 'ANTHROPOLOGY'.
'for' acts as a link.
(Other definitions for anthropology that I've seen before include "Study of humankind" , "Study of human beings and their way of life" .)