SEE 41-DOWN' refers to the term 'OBSERVE', which is a synonym for 'SEE'. The crossword solutions are FEE (a payment), BAY (a body of water), EON (an immeasurably long period of time), IMPEL (to urge or drive forward), AGES (a long period of time), POLES (a long, cylindrical object), ION (an atom or molecule with an electric charge), HOPS (a type of flower used in brewing beer), DEAR (beloved or cherished), ELSE (otherwise), ILER (a person who makes or sells tiles), AGO (in the past), ALL (the whole amount), OUT (away from the inside or center), PIE (a type of dessert), COLA (a type of carbonated beverage), HALF (one of two equal parts), LALA (a nonsense syllable), TREE (a woody plant), NGFOR (a type of computer language) and MCEWAN (a Scottish novelist).