The term 'NO LAYABOUT' can be broken down into two words, 'NO' and 'LAYABOUT'. The word 'NO' is a negative adverb used to express refusal or prohibition. The word 'LAYABOUT' is a noun that refers to someone who is lazy and does not work. The crossword solution for this term is 'DOER', which is a four letter noun that refers to someone who is actively engaged in an activity or task. This person is the opposite of a LAYABOUT, as they are actively working and not being lazy.