Wrapped up in unusually deep novel (9)

I believe the answer is:

enveloped

'wrapped up' is the definition.
(I've seen this before)

'unusually deep novel' is the wordplay.
'unusually' is an anagram indicator.
'deep'+'novel'='deepnovel'
'deepnovel' is an anagram of 'ENVELOPED'.

'in' is the link.

(Other definitions for enveloped that I've seen before include "Concealed" , "Wrapped up" .)

I've seen this clue in The Telegraph.

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