Friendly Queen knocking one out as usual (7)
I believe the answer is:
general
'usual' is the definition.
(I've seen this before)
'friendly queen knocking one out' is the wordplay.
'friendly queen knocking' becomes 'genera' (I can't justify this - if you can you should believe this answer much more).
'one' becomes 'li' (I've seen this in other clues).
'out' means to remove the last letter.
'li' with its final letter taken off is 'l'.
'genera'+'l'='GENERAL'
'as' acts as a link.
(Other definitions for general that I've seen before include "position" , "Common - army officer" , "Army rank" , "Enlarge for senior army officer" , "Officer of the highest rank" .)