Serve heading for Djokovic, more or less (4)
I believe the answer is:
dish
'serve' is the definition.
(I know that serve can be written as dish)
'heading for djokovic more or less' is the wordplay.
'heading for' suggests taking the first letters.
'more or less' becomes 'ish' (I've seen this in another clue).
The initial letter of 'djokovic' is 'd'.
'd'+'ish'='DISH'
(Other definitions for dish that I've seen before include "What's presented on salver" , "Recipe; kitchen item" , "(Food for) serving plate" , "receiver to >screw up" , "Kitchen container" .)