Said to be so different from say profound (7)
I believe the answer is:
intense
'profound' is the definition.
(associated in meaning)
'said to be so different from' is the wordplay.
I cannot really understand how this works, but
'from' could be 'in' (I've seen this in other clues) and 'in' is found within the answer.
The remaining letters 'tense' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'say' acts as a link.
Can you help me to learn more?
(Other definitions for intense that I've seen before include "Fervent" , "Strong in degree or emotion" , "Showing strong feelings or opinions" , "'Acute, extreme (7)'" , "Vived, extreme, acute" .)