Looking tired and wan, is taken off to the doctor (5)
I believe the answer is:
drawn
'looking tired' is the definition.
I can't tell whether this defines the answer.
'wan is taken off to the doctor' is the wordplay.
I cannot really see how this works, but
an anagram of 'wan' is 'awn' which is within the answer.
'doctor' could be 'dr' (abbreviation) and 'dr' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'and' is the link.
Can you help me to learn more?
(Other definitions for drawn that I've seen before include "Described" , "tense" , "stressed" , "Picked" , "Tired and worn" .)