Solitary type accommodating lecturer, a capital person (8)
I believe the answer is:
londoner
'a capital person' is the definition.
(someone from London, the capital of the UK)
'solitary type accommodating lecturer' is the wordplay.
'solitary type' becomes 'loner' (lonely person).
'accommodating' means one lot of letters goes inside another.
'lecturer' becomes 'don' (don can mean an academic).
'loner' placed around 'don' is 'LONDONER'.
(Other definitions for londoner that I've seen before include "Native of Notting Hill or Camden, say" , "Resident of the UK capital" , "Person from England's capital" , "Dweller in UK capital" , "Native of Camberwell, perhaps" .)