Going round island, old band is playing hard rock (8)
I believe the answer is:
obsidian
'hard rock' is the definition.
'Obsidian' can be an answer for 'rock' (I know that Obsidian is a type of volcanic rocks). I am unsure of the 'hard' bit.
'going round island old band is playing' is the wordplay.
'going round' indicates putting letters inside (some letters go around others).
'island' becomes 'i'.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'playing' indicates anagramming the letters.
'o'+'band'+'is'='obandis'
'obandis' with letters rearranged gives 'obsdian'.
'i' going into 'obsdian' is 'OBSIDIAN'.
Can you help me to learn more?
(Other definitions for obsidian that I've seen before include "Dark glassy rock formed from lava" , "Dark volcanic rock" , "Volcanic glass-like rock" , "Dark volcanic glass" , "Dark glass-like rock" .)