Series about entertaining English individual displaying a bit of nerve (7)
I believe the answer is:
neurone
'a bit of nerve' is the definition.
(a neurone is a nerve cell)
'series about entertaining english individual' is the wordplay.
'series' becomes 'run' (run is a kind of series).
'about' says the letters should be written backwards.
'entertaining' indicates putting letters inside.
'english' becomes 'e' (abbreviation).
'individual' becomes 'one' (an individual is one person).
'run' reversed gives 'nur'.
'nur' placed around 'e' is 'neur'.
'neur'+'one'='NEURONE'
'displaying' is the link.
(Other definitions for neurone that I've seen before include "Nerve centre" , "Cell that conducts nerve impulses" , "cell often seen with motor" .)