"Priority target" refers to a person, object, or goal that is given the highest level of importance, attention, or focus in a specific situation or plan. Full definition
According to Sky Sports, not only do they claim that Guardiola will have around # 200m to spend on three signings, but Paris Saint - Germain forward Kylian Mbappe and Bayern Munich midfielder Thiago Alcantara are specifically named as priority targets. (caughtoffside.com)