The antonym of the word 'Chicanery' is -

Chicanery (noun)

English Meaning: Dishonest but attractive talk or behavior that is used to deceive people.
Bangla Meaning: [uncountable noun] প্রতারণা; বৈধ চাতুরী; এর ব্যবহার; [countable noun] চোরা যুক্তি।

Synonyms: Trickery (চালাকি; প্রতারণা), Deception (প্রতারণা; চাতুরী;), Fraud (ছলনা;
প্রবঞ্চনা), Guile(ছলনা), Deceit (শঠতা)।
Antonyms: Candor (সারল্য), Directness (সরাসরিতা), Openness (অকপটতা),
Receptiveness (গ্রহন করার মানসিকতা), Frankness (স্পষ্টতা)।

Other Forms:
Example Sentence: 
1. The investigation has revealed political chicanery and corruption at the highest levels.
2. The two schemers fall for each other but there's a lot of revenge-fueled chicanery before love wins through.

Source: Lecture.