How one might face Grandmaster or General? (6-3-5)
I believe the answer is:
across-the-board
'general?' is the definition.
(thesaurus)
'how one might face grandmaster' is the wordplay.
I cannot really see how this works, but
'one' could be 'the' (both can introduce a definite example of something) and 'the' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
'or' acts as a link.
Can you help me to learn more?
(Other definitions for across-the-board that I've seen before include "generally" , "How men may move" , "General" .)