
1) Break fluid 2) Common object file format 3) Homophone for Chekhov
Found on
https://www.crosswordclues.com/clue/coff

The Common Object File Format (COFF) is a specification of a format for executable, object code, and shared library computer files used on Unix systems. It was introduced in Unix System V, replaced the previously used a.out format, and formed the basis for extended specifications such as XCOFF and ECOFF, before being largely replaced by ELF, intro...
Found on
http://en.wikipedia.org/wiki/COFF

Common Object File Format [Unix]
Found on
http://www.encyclo.co.uk/visitor-contributions.php
No exact match found.