Out of hospital, frequently visit relative (4)
I believe the answer is:
aunt
'relative' is the definition.
(aunt is a type of relative)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for aunt that I've seen before include "Parent's sister" , "Put up with" , "Tuna (anag.)" , "Female relation" , "Blood relative" .)