Get Royal referee's take, say, on a piece of meat (4,5)
I believe the answer is:
rump steak
'piece of meat' is the definition.
'rump steak' can be an answer for 'meat' (rump steak is a kind of meat). I'm not certain of the 'piece of' bit.
'get royal referee's take say' is the wordplay.
'get' means one lot of letters go next to another.
'royal' becomes 'r' (abbreviation).
'referee' becomes 'ump' (I've seen this in another clue).
'take say' becomes 'steak' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'r'+'ump' is 'rump'.
'rump'+'steak'='RUMP STEAK'
'on a' acts as a link.
Can you help me to learn more?
(Other definitions for rump steak that I've seen before include "Meat" , "might be something for the barbecue" , "Cut of beef" .)