Definition of 'play it by ear' - Collins Online Dictionary
https://www.collinsdictionary.com/us/dictionary/english/play-it-by-ear
Webto act as the situation demands, without a preconceived plan; improvise. See full dictionary entry for ear. Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved. play it by ear in American English. to improvise, esp. in a challenging situation when confronted by unknown factors.
DA: 43 PA: 61 MOZ Rank: 53