Painful to include drunk robot in a game (9)
I believe the answer is:
solitaire
'game' is the definition.
(solitaire is a kind of game)
'painful to include drunk robot in a' is the wordplay.
I cannot quite see how this works, but
'drunk' could be 'lit' (I've seen this in other clues) and 'lit' is located in the answer.
'a' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for solitaire that I've seen before include "Game for one person - single gem" , "Diamond; game for one" , "American singer" , "Patience of Americans" , "recluse" .)