Everybody amongst the gentry says they're improperly bowled (2-5)

'improperly bowled' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'everybody amongst the gentry says' is the wordplay.
'everybody' becomes 'all' (I've seen this in another clue).
'amongst' means one lot of letters goes inside another (I've seen this in other clues).
'the gentry says' becomes 'nobs' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'all' put within 'nobs' is 'NO-BALLS'.

'they're' acts as a link.

Can you help me to learn more?