Such subterfuge may be so naive (7)
I believe the answer is:
evasion
'such subterfuge' is the definition.
'evasion' can be an answer for 'subterfuge' (I've seen this in another clue). I'm not certain of the 'such' bit.
'may be so naive' is the wordplay.
'may be' indicates anagramming the letters.
'so'+'naive'='sonaive'
'sonaive' anagrammed gives 'EVASION'.
Can you help me to learn more?
(Other definitions for evasion that I've seen before include "attempt to withhold truth?" , "Avoidance; equivocation" , "Illegal avoidance (of tax)" , "prevaricating excuse" , "Act of avoiding" .)