have big shoes to fill
US /hæv bɪɡ ʃuːz tu fɪl/
UK /hæv bɪɡ ʃuːz tu fɪl/
1.
to have a difficult job to do because the person who did it before you was very good or successful
:
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The new CEO will have big shoes to fill after the legendary founder retired.
•
She's a brilliant teacher, and whoever replaces her will certainly have big shoes to fill.