Without a clue' is an idiom that means to be completely UNAWARE or confused about something. The crossword solutions for this term are NAIVE (5 letters), UNAWARE (7 letters), LOST (4 letters), atsea (5 letters), PUZZLED (7 letters), atwitsend (9 letters), and outinleftfield (14 letters). NAIVE means having or showing a lack of experience, wisdom, or judgement. UNAWARE means not having knowledge or perception of a situation or fact. LOST means unable to find one's way; not knowing one's whereabouts. Atsea means in a state of confusion or bewilderment. PUZZLED means to be perplexed or confused. Atwitsend means to be extremely frustrated or confused. Outinleftfield means to be completely unexpected or strange.