Bombastic speech, extremely rich, recalled rote initially is cringeworthy (8)
I believe the answer is:
rhetoric
'bombastic speech' is the definition.
'rhetoric' can be an answer for 'speech' (rhetoric is a kind of speech). I am not sure about the 'bombastic' bit.
'extremely rich recalled rote initially is cringeworthy' is the wordplay.
'extremely' means to remove the middle letters (only the extremes of the word are used).
'recalled' is a reversal indicator (to recall can mean to bring something back).
'initially' suggests taking the first letters.
'rich' with its middle removed is 'rh'.
The initial letters of 'is cringeworthy' is 'ic'.
'rote' backwards is 'etor'.
'rh'+'etor'+'ic'='RHETORIC'
Can you help me to learn more?
(Other definitions for rhetoric that I've seen before include "Art of effective speaking" , "High-flown speech" , "address" , "insincere stuff" , "Art of using language for persuasion" .)