Just before taking employment I had signed a non complete clause.

The non-compete just states that I will not take employment with any clients
for a period of 1 year. Very basic and straightforward.

My non-compete is almost over, but my former employer has allowedand even
offered other employees that have left the company to take clients with them.
These of course are clients from a closed unit of business and
my former employer doesn't deal in that area of expertise anymore.

Is the non compete then enforceable if other employees who left
were offered clients? Can I actively pursue clients that I know are in the
closed business arena?