comb out is a verb meaning "remove unwanted elements". It carries 2 recorded senses.
remove unwanted elements
“The company weeded out the incompetent people”
“The new law weeds out the old inequities”
smoothen and neaten with or as with a comb
“comb your hair before dinner”
“comb the wool”
Definitions, synonyms and semantic relations for comb out come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.