Starts to ring up rap artist living in the countryside (5)
I believe the answer is:
rural
'in the countryside' is the definition.
(I've seen this before)
'starts to ring up rap artist living' is the wordplay.
'starts to' suggests taking the first letters.
The initial letters of 'ring up rap artist living' is 'RURAL'.
(Other definitions for rural that I've seen before include "Connected with farming" , "Old country fellow" , "Rustic" , "Relating to country life" , "Sort of dean" .)