Currently blocking chesspiece, showing cunning (7)
I believe the answer is:
knowing
'cunning' is the definition.
(I've seen this before)
'currently blocking chesspiece' is the wordplay.
'currently' becomes 'now' (right now).
'blocking' means one lot of letters goes inside another (to block can mean to plug a gap in something).
'chesspiece' becomes 'king' (I can't explain this - if you can you should believe this answer much more).
'now' placed inside 'king' is 'KNOWING'.
'showing' is the link.
Can you help me to learn more?
(Other definitions for knowing that I've seen before include "Meaningful" , "State of awareness" , "Cunning" , "Understanding" , "Wise" .)