Admitting some hesitation, biased editor's stuck (8)
I believe the answer is:
skewered
'stuck' is the definition.
(stick can mean to pierce or skewer)
'admitting some hesitation biased editor's' is the wordplay.
'admitting' means one lot of letters goes inside another (admit can mean to welcome in or accept).
'some hesitation' becomes 'er' (sound made while hesitating - um, er).
'biased' becomes 'skew' (skew can mean biased or unbalanced).
'editor' becomes 'ed' (abbreviation).
'skew'+'ed'='skewed'
'er' inserted within 'skewed' is 'SKEWERED'.
(Other definitions for skewered that I've seen before include "Pierced through with meat pin" , "Fastened together by a pin" , "Pierced through with wooden or metal spike" , "Run through" , "Spiked" .)