[使「し」][役「えき」] => Coercive, permission, allow, make N4
Causative, Passive, Volitional
[使「し」][役「えき」][受「う」]け[身「み」] => Imperative N4
Causative, Passive, Volitional
に[先駆「さきが」]けて => The earliest, very first in A; Ahead of A, in advance of A N1
Time, Situation