Clear is related to Air. Air is related to See. See is related to Sheer. 
Objective is a synonym of Task. Task is related to Small. Small is the opposite of Great. 
Clear <--RelatedTo--> Air <--RelatedTo--> See <--RelatedTo--> Sheer 
Objective <--Synonym--> Task <--RelatedTo--> Small <--Antonym--> Great 