indirect, implied, insinuated, inferred, illusive; see also mental, suggestive.
definite, complex, exact; see detailed.
ingenious, crafty, deft, shrewd.
"subtle." YourDictionary, n.d. Web. 21 May 2018. <http://thesaurus.yourdictionary.com/Subtle>.
subtle. (n.d.). Retrieved May 21st, 2018, from http://thesaurus.yourdictionary.com/Subtle
So slight as to be difficult to notice or appreciate:
Able to make or detect effects of great subtlety or precision: