Doctor Who and Davros absorbing essence of Red Dwarf (10)
I believe the answer is:
overshadow
'dwarf' is the definition.
(I know that dwarf can be written as overshadow)
'doctor who and davros absorbing essence of red' is the wordplay.
'doctor' is an anagram indicator.
'and' means one lot of letters go next to another.
'absorbing' means one lot of letters goes inside another.
'essence of' means to look at the middle letters.
The central letter of 'red' is 'e'.
'who' put after 'davros' is 'davroswho'.
'davroswho' anagrammed gives 'ovrshadow'.
'ovrshadow' going around 'e' is 'OVERSHADOW'.
(Other definitions for overshadow that I've seen before include "Dwarf" , "Cast gloom on" , "Dominate" , "Eclipse" .)