Bit unsettling, entertaining as mum makes rice (7)
I believe the answer is:
basmati
'rice' is the definition.
(I've seen this before)
'bit unsettling entertaining as mum' is the wordplay.
'unsettling' indicates an anagram.
'entertaining' indicates putting letters inside.
'mum' becomes 'ma' ('ma' can be a synonym of 'mum').
'bit' is an anagram of 'bti'.
'as'+'ma'='asma'
'bti' going around 'asma' is 'BASMATI'.
'makes' acts as a link.
(Other definitions for basmati that I've seen before include "Type of long-grained rice" , "Superior fragrant rice" , "Fragrant variety of rice" , "Variety of long-grained rice" , "Fragrant long-grain rice" .)