に[先立「さきだ」]って/に[先立「さきだ」]ち/に[先立「さきだ」]つ => Before A occurs/takes place N2
Time, Situation
に先立って => before; prior to ~ N2
に[先駆「さきが」]けて => The earliest, very first in A; Ahead of A, in advance of A N1
Time, Situation
に先駆けて => prior to; to be the first (pioneer); being ahead of ~ N1
いささか => a bit N3
Evaluate
さ => -ness N4
さえ/にさえ/でさえ => Even N3
Not only, Not even
さあ => well N3
Suggestion
さえ/でさえ => even; so much as; not even N3
...さ => Sentence-ending particle N3
Exclamatory
させてください/させてもらえますか/させてもらえませんか => please let me do N3
さあ => well (negative meaning) N3
Emphasize negative meaning