Detailed lecture by Truss, making comeback? (9)
I believe the answer is:
elaborate
'detailed' is the definition.
(I know that detailed can be written as elaborate)
'lecture by truss making comeback?' is the wordplay.
'lecture' becomes 'orate' (I've seen this before).
'by' says to put letters next to each other.
'truss' becomes 'bale' (both can mean a tied up amount of something).
'making comeback?' shows that the letters should be reversed in order.
'bale' backwards is 'elab'.
'orate' after 'elab' is 'ELABORATE'.
(Other definitions for elaborate that I've seen before include "With many parts or details, maybe a pattern" , "involved" , "Expand (upon)" , "Complicated, with many parts or details" , "Explain details" .)