With great delight, attach video game controller (8)
I believe the answer is:
joystick
'video game controller' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'with great delight attach' is the wordplay.
'with' means one lot of letters go next to another.
'great delight' becomes 'joy' (I've seen this in another clue).
'attach' becomes 'stick' (sticking is a kind of attaching).
'joy' put next to 'stick' is 'JOYSTICK'.
Can you help me to learn more?
(Other definitions for joystick that I've seen before include "girl's to click" , "Pilot's manual control" , "Flight control lever" , "Manual computer game gadget" , "Aircraft's control lever" .)