Fancies a doctor has the same disposition (6)
I believe the answer is:
dreams
'fancies' is the definition.
(I've seen this before)
'a doctor has the same disposition' is the wordplay.
'a doctor' becomes 'dr' (abbreviation).
'has' is a charade indicator (letters next to each other).
'disposition' is an anagram indicator.
'same' anagrammed gives 'eams'.
'dr'+'eams'='DREAMS'
(Other definitions for dreams that I've seen before include "'We are such stuff / As dreams are made on' (The Tempest)" , "Imaginings" , "Thoughts and visions during sleep" , "Fantasies; fantasises" , "Fantasy ambitions" .)