Answer:

iest

AnswerCrossword Clue
IEST-y to the max
IESTEnding with brawn or brain
IESTEnding with rain or snow
IESTSuperlative suffix
IESTEnding with brain or brawn
IESTHair extension?
IESTSuperlative ending
IEST"y" to the max
IESTY to the max?
IEST"y" ending, in superlative form
IESTPluck or hair extension?
IESTFollower of blood and guts
IESTSuffix with luck
IESTSuperlative of '-y'
IESTSuffix with "hair"
IESTSuperlative ending with grass or glass