Answer: slenderer

AnswerCrossword Clue
SLENDERERLess robust.
SLENDERERRelatively rawboned
slenderer(of something abstract) Barely sufficient in amount or basis
slenderer(esp. of a rod or stem) Of small girth or breadth
slenderer(of a person or part of the body) Gracefully thin
slendererSLENDER, slim (slender)