Able cast make a speech pompously baroque (9)
I believe the answer is:
elaborate
'pompously baroque' is the definition.
'elaborate' can be an answer for 'baroque' (thesaurus). I am unsure of the 'pompously' bit.
'able cast make a speech' is the wordplay.
'cast' indicates an anagram (letters are dispersed or cast around).
'make a speech' becomes 'orate' (I've seen this before).
'able' anagrammed gives 'elab'.
'elab'+'orate'='ELABORATE'
Can you help me to learn more?
(Other definitions for elaborate that I've seen before include "Give more details" , "Add details to clarify meaning" , "With many parts or details, maybe a pattern" , "involved" , "Highly detailed" .)