Cartoon strip that's of little worth (7)
I believe the answer is:
peanuts
I believe this is a double definition.
'cartoon strip' is the first definition.
(cartoon strip featuring Charlie Brown)
'that's of little worth' is the second definition.
(peanuts informally means a tiny sum of money)
(Other definitions for peanuts that I've seen before include "Insignificant amount of money for the seeds" , "Cartoon strip; tiny sum" , "pittance" , "Schulz comic strip" , "bar snack" .)