go–to 
/ˈgoʊˌtu:/ adjective
always used before a noun /ˈgoʊˌtu:/ adjective US, informal : always helpful : producing desired results or information when needed
▪ She's the team's go-to player [=she is the player that the team relies on] when they need to score late in the game. ▪ He's the go-to guy in the office for tax information.
▪ She's the team's go-to player [=she is the player that the team relies on] when they need to score late in the game. ▪ He's the go-to guy in the office for tax information.
