tidy up vs clean house

tidy up and clean house both are verbs.

Word	Noun	Adjective	Verb	Adverb
tidy up	No	No	Yes	No
clean house	No	No	Yes	No

As verbs, clean house is a hyponym of tidy up; that is, clean house is a word with a more specific, narrower meaning than tidy up:

Other hyponyms of tidy up include make, make up, clean, houseclean.

tidy up (verb)	clean house (verb)
put (things or places) in order	clean and tidy up the house