It is the tendency of a subject to become more powerfully attracted to the conditioned stimulus than to the unconditioned stimulus it signals. It is the tendency of a new stimulus that is similar to the original conditioned stimulus to elicit a response that is similar to the conditioned response?

The answers is Generalization/classical conditioning or Stimulus Generalization

Explanation:

Based on what you wrote this is generalization in classical conditioning.

Classical conditioning is the learning process in which a neutral stimulus becomes associated with an innately meaningful stimulus and acquires the capacity to elicit a similar response

It is the tendency of a new stimulus that is similar to the original conditioned stimulus to elicit a response that is similar to the conditioned response - Stimulus Generalization