### Clue: Son isn't a planned outcome of their actions (8)
### Answer: ONANISTS 
 ### Explanation: Definition: Son isn't a planned outcome of their actions 
 **Anagram of**(… planned) SON ISN'T A.
Defn: Those who practise coitus interruptus, as a means of birth control, or masturbation or as Woody Allen puts it, "sex with someone you love". Either way the planned outcome is not a son (or even daughter).
A WIWD(wordplay intertwined with definition) clue.