Pop star having celebration with heavenly food brought round (7)
I believe the answer is:
madonna
'pop star' is the definition.
(I've seen this before)
'celebration with heavenly food brought round' is the wordplay.
'celebration with' becomes 'do' (I can't explain this - if you can you should believe this answer much more).
'heavenly food' becomes 'manna' (as in manna from heaven).
'brought round' is an insertion indicator.
'do' put inside 'manna' is 'MADONNA'.
'having' acts as a link.
Can you help me to learn more?
(Other definitions for madonna that I've seen before include "American pop singer" , "Virgin Mary - or American showbiz queen" , "pop star" , "Representation of the Virgin Mary" , "Religious work" .)