Answer: finetune

AnswerCrossword Clue
FINETUNE

Make perfect

FINETUNE

Tweak

FINETUNE

Improve in small ways

FINETUNE
Make minor changes to
FINETUNE
Make minor improvements to
FINETUNEHone
FINETUNEMake minor adjustments to
FINETUNEEdit slightly
FINETUNEAdjust
FINETUNEMake just right
FINETUNEMake purr, as an engine
FINETUNEMake minor adjustments