Film I presented in rice production centre (6)
I believe the answer is:
patina
'film' is the definition.
(both can mean a layer)
'i presented in rice production centre' is the wordplay.
I cannot quite understand how this works, but
'i' could be 'a' and 'a' is found in the answer.
'in' is found in the answer.
The remaining letters 'pta' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for patina that I've seen before include "Developing surface film; sheen" , "A surface gloss produced by age" , "Sheen acquired from constant handling" , "Surface film formed by age" , "Gloss or colour produced by a paint" .)