Something to sustain enthusiast: old poetry books? (9)

I believe the answer is:

nutriment

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'something to sustain' is the definition.
I can't judge whether this defines the answer.

'enthusiast old poetry books?' is the wordplay.
'enthusiast' becomes 'nut' (nut can mean an enthusiast or fan).
'old poetry' becomes 'rime' (archaic spelling of 'rhyme').
'books?' becomes 'NT' (New Testament).
'nut'+'rime'+'nt'='NUTRIMENT'

Can you help me to learn more?

(Other definitions for nutriment that I've seen before include "diet" , "Sustenance, nourishment" , "Material providing food" , "Nourishing food" , "It sustains" .)

I've seen this clue in The Telegraph and The Sun.

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