The theme of this creation, in clever sequestration (5)
I believe the answer is:
verse
'the theme of this creation' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'in clever sequestration' is the wordplay.
'in' says the answer is hidden in the clue.
'VERSE' is hidden in the letters of 'clever sequestration'.
Can you help me to learn more?
(Other definitions for verse that I've seen before include "few lines of writing?" , "Metrical text" , "Poems" , "literary offering" , "Poetry - subdivision of the Bible" .)