yatrāvasthāntare vyavadhānaṃ dūradeśāvasthānaṃ virodhinā pratihatirityādikāryotpattipratibandhakaṃ nāstītyarthaḥ /
The meaning is that [it refers to] that particular condition where there is no obstacle to the arising of the effect, such as intervention, location in a distant place, obstruction by an opposing [force], etc.