What is the definition of affective cueing?
There is no agreed-upon definition of affective cueing because it's not a proper name. If you google for "affective cueing" you only find a handful of hits and in them the term is used differently, mostly to indicate that some cue (a stimulus that carries information) is of positive versus negative valence.

In contrast, affective priming refers to a specific, experimental research paradigm: 


  Affective priming investigates whether the evaluation of a first stimulus, the prime, that is to be ignored, affects the processing of subsequent stimuli.


(as described in the article you found)