If SON is HALF NELSON, what about................

1. EEP
2. CLE
3. TER
4. LAR
5. FIN
6. LIP
7. TIN
8. LI
9. M
10. COMP

Answers:

1. Half asleep
2. Half circle
3. Half sister
4. Half dollar
5. Semifinals
6. Partial elipse (ecLIPse)
7. Piece of writing 
8. Line segment
9. Quarter moon
10. Part company

Credits:
#1-4: NY Times Crossword
February 26, 2015 
Caleb Emmons (Posted July 17, 2015)

#5-7: 
NY Times Crossword
Dec. 27, 2012
Julian Lim 

#8-10:
Joseph Appel