Possible Clues:

• Measure fish to be daft
• Petty playing about involving third of set
• Messing around time for minor
• Standing across line is foolish
• Silly clowning around outside back of hut
• Frivolous Liberal in secure position
• Trivial
• Even with twelve in it with the fish, there was only little of it
• Trivial, irritating
• Excessively head over heels in love affair of little consequence