Lowly lord keeps Tesla in farmyard (6)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

BARON (the lowest rank of the British peerage, so ‘lowly lord’) around T (keeps Tesla). A barton is primarily (though not only) a West Country term for a large farm or small manor rather than a farmyard as such, though in Thomas Hardy’s wonderful Christmas poem ‘The Oxen’ it might arguably refer to a barn. However, Chambers does give the single definition ‘a farmyard’, so I can’t quibble. Except to make the heretical point that Chambers isn’t always right