[racket] splicing into local

I have a define form that expands into two two definitions.  Usually I can write

(my-define ...) ==> (begin (define ...) (define ...))

However, this doesn't interact well with local.  Is there a way of
identifying that I'm in a local context and expanding into something
else so that this "just works"?

[I don't suppose local would be willing to accommodate such forms by
splicing begin's...]

Naturally, documentation pointers/terms welcome.  Thanks.

Shriram