It's nice without the second bumpkin (7)
I believe the answer is:
peasant
'second bumpkin' is the definition.
'peasant' can be an answer for 'bumpkin' (I've seen this before). I'm unsure of the 'second' bit.
'it's nice without the' is the wordplay.
'it' becomes 'sa' (SA can mean sex appeal, as in 'it').
'nice' becomes 'pean' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'without' indicates putting letters inside.
'the' becomes 't' (the is pronounced as a 't' sound in some dialects).
'sa' placed within 'pean' is 'peasan'.
'peasan'+'t'='PEASANT'
Can you help me to learn more?
(Other definitions for peasant that I've seen before include "Poor rustic" , "Farm worker - ignorant person" , "Yokel" , "Poor farmworker" , "Revolting person" .)