Is not wrong about its being yet to come (2,5)
I believe the answer is:
in store
'to come' is the definition.
(I've seen this before)
'is not wrong about' is the wordplay.
'wrong' is an anagram indicator.
'about' becomes 're' (regarding).
'is'+'not'='isnot'
'isnot' anagrammed gives 'insto'.
'insto'+'re'='IN STORE'
'its being yet' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for in store that I've seen before include "Put by" , "stocked" , "coming soon" , "Soon to happen" , "where shoppers are found" .)