www.thefreedictionary.com/selfish+person Information about selfish person in the free online English dictionary and ... exploiter, user - a person who uses something or someone selfishly or unethically.
Thank you all for confirmation of USER definition.
Clue to 30 is "Referee collapses due to drugged cigarette". Obviously should be an anagram (collapses) of REFEREE but this gives one too may E's for the answer REEFER. Is it just a faulty clue?