a pocket of resistance

a Determinative

— A is used when the following word could be any of a certain type. Compare "A book I saw on the shelf" and "The book I gave you yesterday".

a Noun

— A is the first letter of the alphabet. The letter "a" comes before "b". — In some schools, an A is a very high grade. Ron got an A on his earth science test.

pocket Noun

— A pocket is a small empty space, usually in your clothes, usually to carry things in. I usually put my keys in my pants' pocket, but I can't find them now. My cell phone is in the outside pocket of my bag. — A pocket is a small area of something that is completely surrounded by something else. There was a small pocket of air under the boat. There is a pocket of Welsh-speaking villages in South Wales.

pocket Verb

— If you pocket something you put it in your pocket. — If you pocket something you win, take, or steal it (and put it in your pocket.)

of Preposition

— Made using. It is a house of cards.

resistance Noun

— Resistance is the amount of force pushing against an object. As I run, the resistance of the air slows me down by a bit, making it harder for me to run faster. — Resistance is electrical resistance, which is the opposition to the flow of an electrical current. — A resistance is an illegal organization that tries to use force to fight for freedom and human rights.