A sight in bed, wearing glasses! (12)

I believe the answer is:

bespectacled

I'm a little stuck... Click here to teach me more about this clue!

'wearing glasses' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

(Other definitions for bespectacled that I've seen before include "equipped with visual aid" , "Like Harry Potter" , "Wearing glasses" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app