If you already have a whole house one you can cheat by just making up an extension socket and running one of the wires out a bit longer (e.g. the Neutral) and putting the current clamp over that. If you are doing it for more that just a quick test you will want to add extra insulation though
If you do find one then you might also need to be careful that it measures ‘real’ power rather than just VA. A fridge is a funny load as it contains a motor so there is lots of current sloshing around but not so much ‘real’ power. Cheaper meters just measure peak current and multiply that by the voltage so they will read high. In reality you might not care though if you are only looking for a guestimate