Like rook moves, perhaps, what’s odd about king and pawn finish after I moved? (13)
I believe the answer is:
perpendicular
'like rook' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'moves perhaps what's odd about king and pawn finish after i moved?' is the wordplay.
I cannot really understand how this works, but
'about' could be 'c' (circa) and 'c' is present in the answer.
'king' could be 'er' (abbreviation for Edward Rex, various English kings) and 'er' is present in the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is found in the answer.
'pawn' could be 'p' and 'p' is found in the answer.
'i' could be 'a' and 'a' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for perpendicular that I've seen before include "style of construction" , "Sort of architecture" , "Sheer" , "At ninety degrees" , "Like this answer [1A], relative to 1 dn" .)