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Study of local area as explorer got back round furthest part of Germany (8) ????L?G?
Working animals regularly deployed in the farm (4) T?A?
Wearing clothes makes you hot when sleeping, it's maintained (7)

ThE fArM

thanks ixion

2nd one...topology.

toPOLOgy?

Thanks Terry

last one looks a bit odd but I think it's-

Habited. H ab(it)ed.