There's nothing out about these minor measures (3)
I believe the answer is:
ins
'measures' is the definition.
(in is a kind of measure)
'there's nothing out about these minor' is the wordplay.
'there's nothing' becomes 'nil' (nil means a score of zero in football).
'out' means to remove the last letter.
'about' is a reversal indicator.
'these minor' becomes 's' (I am not sure about this - if you are sure you should believe this answer much more).
'nil' with its final letter taken away is 'ni'.
'ni' in reverse letter order is 'in'.
'in'+'s'='INS'
Can you help me to learn more?
(Other definitions for ins that I've seen before include "Ruling party" , "- - and outs" , "Party of government" .)