見当も

not even a clue

→ 見当
phrase Rare #24,085
not even a clue Usually used in the expression 見当もつかない, meaning “to have no idea” or “to have not the slightest clue.” も adds emphasis, like “even” or “not even.”
JA: 彼がどこにいるのか、見当もつかない。
EN: I don't have the slightest idea where he is.

見当もつきません

I have no idea.

— レベッカ (1940)

それが何か見当もつかない

I have no idea what that is.

見当もつかない

I have no idea.

— グッドフェローズ (1990)

なぜ我々を孤立させる見当も夫と話せない

I have no idea why they’re isolating us, and I can’t talk to my husband either.

— REC / レック (2007)