Related Clues:

• Glib, too easy
• Glib or fluent (6)
• Lacking depth, argument say
• Glib or superficial
• It's not deep
• Easily achieved but of little value
• Of waters, not deep
• Of water, not deep
• Too easily achieved, glib
• Fluent but glib
• Arrived at without due care or effort
• Migratory bird with forked tail
• Not deep enough for a sound of what will be coming to 17 down.
• DNE's just a parody
• This will not be a deep cry of pain.