Half of the spectres rattle supporting framework (7)
I believe the answer is:
trestle
'supporting framework' is the definition.
(I've seen this in another clue)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for trestle that I've seen before include "Frame to hold table" , "Table support frame" , "support of growth" , "Supporting framework for, eg, table top" , "Supporter" .)