The term 'well, obviously!' can be expressed in three different ways in a crossword puzzle. The first is 'DUH' which is a slang term used to express disbelief or surprise. The second is 'NODUH' which is an acronym for 'No Duh' and is used to express agreement or understanding. The third is 'ICANSEE' which is an acronym for 'I Can See' and is used to express agreement or understanding. All three of these terms are used to express the same sentiment of agreement or understanding with the phrase 'well, obviously!'