Husked rice in fertiliser may provide such treatment (8)
I believe the answer is:
manicure
'such treatment' is the definition.
'manicure' can be an answer for 'treatment' (nail treatment). I am not sure about the 'such' bit.
'husked rice in fertiliser' is the wordplay.
'husked' indicates the central letters (the word's 'husk' is removed).
'in' is an insertion indicator.
'fertiliser' becomes 'manure' (I've seen this before).
The middle of 'rice' is 'ic'.
'ic' inserted into 'manure' is 'MANICURE'.
'may provide' acts as a link.
Can you help me to learn more?
(Other definitions for manicure that I've seen before include "attention to extremities" , "Work on nails" , "Cosmetic treatment for the hands" , "Trim" , "Cosmetic care of the hands" .)