For each exercise, study closely with care (6)
I believe the answer is:
peruse
'study closely with care' is the definition.
I can't judge whether this definition defines the answer.
'for each exercise' is the wordplay.
'for each' becomes 'per' (per person).
'exercise' becomes 'use' (synonyms).
'per'+'use'='PERUSE'
Can you help me to learn more?
(Other definitions for peruse that I've seen before include "Scrutinise" , "Browse, read casually" , "Run one's eye over" , "'Read through, browse (6)'" , "Scan carefully for rupees" .)