Glass is raised by girl in Scots town (8)
I believe the answer is:
obsidian
'glass' is the definition.
(I've seen this before)
'is raised by girl in scots town' is the wordplay.
'raised by' shows that the letters should be reversed in order.
'girl' becomes 'di'.
'in' means one lot of letters goes inside another.
'scots town' becomes 'oban' (I have seen 'Scottish town' mean 'oban' so perhaps 'town' could also mean 'oban'. I am not sure about the 'scots' bit.).
'is' back-to-front is 'si'.
'si'+'di'='sidi'
'sidi' going inside 'oban' is 'OBSIDIAN'.
Can you help me to learn more?
(Other definitions for obsidian that I've seen before include "Dark volcanic rock" , "A glassy volcanic rock" , "Dark glass-like rock" , "Dark volcanic glass" , "Glass bottle may be in this" .)