The term 'lie in ambush' is a phrase used to describe a situation where someone or something is waiting in a hidden place to surprise an unsuspecting victim. The crossword solutions for this term are 'LURK' (4 letters), 'AWAIT' (5 letters), and 'COUCH' (5 letters). LURK means to hide or remain unseen, AWAIT means to wait for something to happen, and COUCH means to lie in a concealed position. Therefore, the phrase 'lie in ambush' can be interpreted as hiding and waiting in a concealed position to surprise an unsuspecting victim.