Master the care problem (7)
I believe the answer is:
teacher
'master' is the definition.
(I've seen this before)
'the care problem' is the wordplay.
'problem' indicates an anagram.
'the'+'care'='thecare'
'thecare' with letters rearranged gives 'TEACHER'.
(Other definitions for teacher that I've seen before include "Schoolmaster/mistress" , "Member of school staff" , "The race (anag.)" , "Schoolmaster" , "supply?" .)