Function film star Richard hosts at home, serving fruit (9)
I believe the answer is:
tangerine
'fruit' is the definition.
(tangerine is a kind of fruit)
'function film star richard hosts at home' is the wordplay.
I cannot really see how this works, but
'function' could be 'tan' (tangent, mathematical function) and 'tan' is located in the answer.
'at' could be 'in' (synonymous in some cases - eg at school, in school) and 'in' is found in the answer.
The remaining letters 'gere' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'serving' is the link.
Can you help me to learn more?
(Other definitions for tangerine that I've seen before include "Kind of orange" , "Small orange" , "Variety of mandarin orange" , "Orange-type fruit" , "shade" .)