Trap too devious for underground section (7)
I believe the answer is:
taproot
'underground section' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'trap too devious' is the wordplay.
'devious' is an anagram indicator.
'trap'+'too'='traptoo'
'traptoo' with letters rearranged gives 'TAPROOT'.
'for' is the link.
Can you help me to learn more?
(Other definitions for taproot that I've seen before include "Main underground part of plant" , "infrastructure" , "Plant's main source of nourishment" , "Main part of plant in earth" , "Part of plant growing down vertically" .)