...fan in seat twisted around like this (10)
I believe the answer is:
enthusiast
'fan' is the definition.
(I know that fan can be written as enthusiast)
'in seat twisted around like this' is the wordplay.
'twisted' indicates an anagram.
'around' is an insertion indicator.
'like this' becomes 'thus' (I've seen this before).
'in'+'seat'='inseat'
'inseat' anagrammed gives 'eniast'.
'eniast' enclosing 'thus' is 'ENTHUSIAST'.
(Other definitions for enthusiast that I've seen before include "One deeply interested in a subject" , "Devotee" , "Ardent supporter" , "buff" , "Fan" .)