The term 'Like a Doubting Thomas' is an idiom that refers to someone who is skeptical or unwilling to believe something without proof. The crossword solution for this term is 'LEERY, ' which means to be cautious, suspicious, or distrustful. Therefore, the phrase 'Like a Doubting Thomas' and the word 'LEERY' both refer to someone who is not easily convinced and requires evidence before believing something.