Intriguing duo to do much better (5)
I believe the answer is:
outdo
'better' is the definition.
(to outdo is to beat or do better than)
'intriguing duo to' is the wordplay.
'intriguing' indicates an anagram (I've seen this in other clues).
'duo'+'to'='duoto'
'duoto' with letters rearranged gives 'OUTDO'.
'do much' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for outdo that I've seen before include "Best" , "Get the better of" , "Perform better than (someone)" , "Surpass someone at something" , "Beat" .)