How to get rid of echo?

[Frankers]

Hi there.
I've got a recordning I would want to clean up. The problem is echo. The echo is probably of such kind where there is an extra mic in the room picking up audio from playback speakers and mixed into the audio file I am in possession of. The echo lags about 100 mS behind. Is there an inbuilt functionality or through a module suitable for reducing echo?
Tx folks.
Btw, is there a better forum for this question?