(not) have a clue

informal

to have no knowledge of or no information about something.

'How much do houses cost in Yorkshire?' 'I haven't got a clue.'

Internet researchers in the 1980s didn't have a clue about the exciting online landscapes of the future. (often + about)

• shoot yourself in the foot
• shoot your wad
• shop around
• shop talk
• shore up
• shore up something
• short and sweet
• short-arse
• short-change
• short-change someone
• short for
• short for something
• short fuse
• short of
• short of something
• short on
• short on and long on
• short on and long on something else
• short on something
• short on something and long on
• short on something and long on something else
• short sharp shock
• short-term
• shot across the bow
• shotgun wedding