Hints:
One is an anagram (rearrange letters of some of the clue words to make the answer word)
One is a run-on (the answer word is in plaintext, all letters in sequence)
One is a charade (some clue words have synonyms which you string together to make the answer word)
One is more impressionistic, with two approaches--one clue word is a synonym of a synonym of the answer word, another two words are related (ambiguously...) to a key semantic fact about the answer word.