Figure of 'The Genie set free' (8)
I believe the answer is:
eighteen
'figure' is the definition.
The answer and definition can be both quantities as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'the genie set free' is the wordplay.
'set free' is an anagram indicator (the letters are free to move around).
'the'+'genie'='thegenie'
'thegenie' is an anagram of 'EIGHTEEN'.
'of' is the link.
Can you help me to learn more?
(Other definitions for eighteen that I've seen before include "Old enough to vote" , "when boy becomes man?" , "age of maturity" , "Greens on a golf course?" , "Treble six" .)