Answer: housesat

AnswerCrossword Clue
HOUSESAT

Provided home security, in a way

HOUSESAT

Helped out vacationing friends, maybe

HOUSESAT

Took care of a vacationer's residence

HOUSESAT
Watched things
HOUSESAT
Filled in for a vacationer, in a way
HOUSESATCared for a home while the owner was away
HOUSESATMinded the mansion, e.g.
HOUSESATDid home work?