In sci-fi etc., fantasy is based on verifiable, predictive data (10)
I believe the answer is:
'based on verifiable predictive data' is the definition.
The answer and definition are not the same part of speech. However, adjectives and past participle verbs occasionally define each other.
'in sci-fi etc fantasy' is the wordplay.
'in sci-fi etc' can be anagrammed to 'SCIENTIFIC'.
But, I am not sure how this is indicated.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for scientific that I've seen before include "using what's proven" , "As experiment" , "Trained in biology, perhaps" , "Systematic; methodical" , "Based on observation" .)