Refute it? Maybe about right. It could provide apples (5,4)
I believe the answer is:
fruit tree
'it could provide apples' is the definition.
The definition suggests a singular noun which matches the answer.
'refute it? maybe about right' is the wordplay.
'maybe' is an anagram indicator.
'about' means one lot of letters goes inside another.
'right' becomes 'r' (common abbreviation).
'refute'+'it'='refuteit'
'refuteit' with letters rearranged gives 'fruittee'.
'fruittee' enclosing 'r' is 'FRUIT TREE'.
Can you help me to learn more?
(Another definition for fruit tree that I've seen is " Perhaps apple".)