بل هو اللازم مع جواز إرادة الملزوم
Rather, it is the concomitant, with the possibility of intending the antecedent as well.
This corrects a possible misunderstanding: the concomitant is the allusively intended meaning, while literal intention remains permitted. That permission is not a second compulsory piece of a composite meaning actually intended every time.
In “ṭawīl al-nijād” the allusive point is tallness. The long sword-strap may also be literally intended, but kināyah does not vanish if the speaker primarily wishes to communicate only tallness, provided the literal reading has not been ruled out.