Jazz fan upset with bluesman changing direction (7)
I believe the answer is:
tacking
'changing direction' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'jazz fan upset with bluesman' is the wordplay.
'jazz fan' becomes 'cat' (I've seen this before).
'upset' shows that the letters should be reversed in order.
'with' means one lot of letters go next to another.
'bluesman' becomes 'king' (I am not sure about this - if you are sure you should believe this answer much more).
'cat' backwards is 'tac'.
'tac'+'king'='TACKING'
Can you help me to learn more?
(Other definitions for tacking that I've seen before include "Fastening" , "changing direction under sail" , "changing course" , "stitchery" .)