Solutions bag-checking org. has 8 entries with similar clues
- externalConstant checking by particular type of examiner
- dipstickDevice for checking oil level
- test-cardDetailed pattern for checking TV picture
- roll-callMeans of checking that are present
- playtesterone checking a new computer game for bugs or flaws before its release
- creditcardsThey're often charged when checking out (... letters 5-11)
- remeasuringchecking again with a ruler
- spirit-levelTool for checking horizontality