cover-up noun
ADJ. big, major | government VERB + COVER-UP be engaged in, be implicated in, be involved in Military leaders were involved in a major cover-up. | accuse sb of
PREP. ~ by cover-ups by the police | ~ over evidence of a cover-up over arms sales
PHRASES allegations/claims of a cover-up
You can also check other dicts: cover-up (English, 中文解释 ), wordnet sense, Collins Definition