Shakespeare supports rogue dagger holder (8)
I believe the answer is:
scabbard
'dagger holder' is the definition.
'scabbard' can be an answer for 'holder' (I've seen this before). I am not certain of the 'dagger' bit.
'shakespeare supports rogue' is the wordplay.
'shakespeare' becomes 'bard' (Shakespeare is known as the Bard).
'supports' means one lot of letters go next to another (bottom letters provide a support for the top ones).
'rogue' becomes 'scab' (scab can mean a dishonourable person).
'bard' after 'scab' is 'SCABBARD'.
Can you help me to learn more?
(Other definitions for scabbard that I've seen before include "foil container?" , "Holding a weapon" , "that carries a sword" , "It keeps food off clothes" , "Sheath for sword or dagger" .)