Problem raised about outfield isn't surprising, given this many errors? (9,2,4)
I believe the answer is:
multitude of sins
Here is my best explanation:
'this many errors?' is the definition.
The definition suggests a singular noun which matches the answer.
'problem raised about outfield isn't surprising' is the subsidiary indication.
'problem' becomes 'sum' (arithmetic problem**).
'raised' says the letters should be written in reverse.
'about' means one lot of letters goes inside another.
'surprising' indicates anagramming the letters.
'sum' written backwards gives 'mus'.
'outfieldisnt' anagrammed gives 'ltitudeofsin'.
'mus' placed around 'ltitudeofsin' is 'multitudeofsins'.
'given' is the link.