Maiden in bed with eastern philosopher (5)
I believe the answer is:
comte
'philosopher' is the definition.
(I know that Comte is a philosopher)
'maiden in bed with eastern' is the wordplay.
'maiden' becomes 'm' (cricket abbreviation).
'in' means one lot of letters goes inside another.
'bed' becomes 'cot' (cot is a type of bed).
'with' means one lot of letters go next to another.
'eastern' becomes 'e'.
'm' inserted inside 'cot' is 'comt'.
'comt'+'e'='COMTE'
(Other definitions for comte that I've seen before include "French nobleman" , "Foreign nobleman" , "Philosopher" .)