Sound means of accessing field technique (5)
I believe the answer is:
style
'technique' is the definition.
(I've seen this in another clue)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for style that I've seen before include "Elegance, sophistication" , "Distinctive arrangement, elegance" , "Fashion or design" , "With 1a [NEW] dating from 1752" , "Manner or way of doing something" .)