Intermediate puzzle with intro replaced (6)
I believe the answer is:
middle
'intermediate' is the definition.
(synonyms)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for middle that I've seen before include "Centre point" , "Group of clubs; distance" , "Centre or core" , "It's equidistant from the extremes" , "Intermediate" .)