Way to bitch regularly — not if this (5)
I believe the answer is:
stoic
'not if this' is the definition.
The definition suggests a singular noun which matches the answer.
'way to bitch regularly' is the wordplay.
'way' becomes 's' (Compass direction - South).
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternate letters of 'bitch' are 'ic'.
's'+'to'+'ic'='STOIC'
Can you help me to learn more?
(Other definitions for stoic that I've seen before include "he's not complaining" , "Uncomplaining person" , "Unemotional" , "One indifferent to fortune, pleasure and pain" , "One who endures pain with equanimity" .)