Tended feverish user in middle of London (6)
I believe the answer is:
nursed
'tended' is the definition.
(I've seen this before)
'feverish user in middle of london' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'user' is 'urse' which is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for nursed that I've seen before include "Cared for a patient" , "Took care of while ill" , "Tended to the sick, cared for" , "Cared for the ill" , "26dn the ill" .)