turf
noun [ U ]
uk/tɜːf/ usan area of activity in which a person or company has a lot of knowledge and experience and which they believe belongs to them:
By launching a line in beauty products they are challenging the bigger company on its own turf.
It was an unproductive meeting with everyone simply trying to defend their own turf.
come/go with the turf
used to say that someone should accept something because it is a necessary part of what they are doing:
In this job customer complaints come with the turf.
Of the fierce media attention he says: 'It goes with the turf'.
on home turf
in your own country, town, area, etc.:
Export figures are good, but the company is losing sales on home turf.