Possible Clues:

• Lacking foundation, as rumours may
• Without foundation, as rumours may be
• Lacking foundation
• Unfounded praise for containment of turbulent sea
• Without foundation or substance
• Lacking foundation, unsupported
• Lacking 12 across - and lacking a foundation, too
• What the G.I. didn't want to be?
• Groundless, unfounded
• Fish, netting strange eels? Wrong, as a matter of fact