Handwritten manuscript on table, beneath his head, pupil wearing glasses (9)

'handwritten manuscript' is the definition.
'holograph' can be an answer for 'manuscript' (synonyms). I'm unsure of the 'handwritten' bit.

'table beneath his head pupil wearing glasses' is the wordplay.
I cannot quite understand how this works, but
'pupil' could be 'l' and 'l' is found in the answer.
'glasses' could be 'oo' (OO looks like spectacles) and 'oo' is located in the leftover letters.
This may be the basis of clue (or it may be nonsense).

'on' acts as a link.

Can you help me to learn more?