The Only Use of

render

in

The Great Gatsby

But, because the offer was obviously and tactlessly for a service to be rendered, I had no choice except to cut him off there.
p. 83.2

rendered = given

Definitions:

(1) (render as in: rendered service or a verdict)
to give or supply something
(2) (render as in: rendered her unconscious)
to make or cause to become
(3) (render as in: rendered interpretation)
to portray or create something in a particular way; or to interpret, translate, or extract from
The exact meaning of this sense of render depends upon its context. For example:
- "Each artist will render a different interpretation when painting a portrait." -- create in a particular way
- "A Supreme Court judge may render his own interpretation of the Constitution." -- interpret in a particular way
- "The computer you are using, rendered this page from software instructions." -- created through interpretation
- "A graph is rendered from the underlying data." -- made
- "Fat can be rendered (extracted) by cooking meat slowly." -- extracted from
(4) (meaning too rare to warrant focus)
A comprehensive dictionary will have more specialized definitions of render.