Make an effort to study with care (7)
I believe the answer is:
contend
'make an effort to' is the definition.
I can't tell whether this definition defines the answer.
'study with care' is the wordplay.
'study' becomes 'con' (con can mean to study).
'with' is a charade indicator (letters next to each other).
'care' becomes 'tend' (I've seen this before).
'con'+'tend'='CONTEND'
Can you help me to learn more?
(Other definitions for contend that I've seen before include "Struggle in rivalry" , "Struggle (with someone)" , "Compete; deal (with)" , "Tend NCO (anag.)" , "Debate - contest - claim" .)