成唯識論演祕 1.198

1.198

此通熏、修二義。若不熏修殊勝定故，勝定之障。若受勝能障修於定，勝即是障。後解為正。

This applies to both senses of "perfuming" and "cultivation": if one does not perfume and cultivate superior concentration, it is a hindrance to superior concentration; if sensation's superiority can hinder the cultivation of concentration, then superiority is itself the hindrance. The latter explanation is correct.