Crossword puzzle clue "investigation designed to expand knowledge"

Here are the possible solutions for investigation designed to expand knowledge clue

Answer
Clue
Relevancy
research
Clue
Investigation designed to expand knowledge
Definition
to investigate thoroughly
addon
Clue
Expand
addonto
Clue
Expand
Expand, as a home
Expand, as a house
Expand, as a residence
addto
Clue
Expand upon
Expand, as a collection

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