A good trial run designed to get you to like nachos (10)
I believe the answer is:
triangular
'get you to like nachos' is the definition.
I can't judge whether this defines the answer.
'a good trial run designed' is the wordplay.
'good' becomes 'g' (abbreviation).
'designed' indicates anagramming the letters (designed with the letters).
'a'+'g'+'trial'+'run'='agtrialrun'
'agtrialrun' anagrammed gives 'TRIANGULAR'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for triangular that I've seen before include "involving three people?" , "Three-sided" .)