The most common and most likely answer to this crossword clue is the 10 letter word CAN-OPENER
I've seen this crossword clue in The Guardian
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More clues leading to the result CAN-OPENER
Buddy explains!
The straight part
We know that "Jailer/means of access to fast food?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case jailer/means of access to fast food? = can-opener.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does CAN-OPENER mean?
CAN-OPENER noun- A device used to open tin cans, usually by slicing the lid off.
- A shoulder hit to the chest, usually accomplished while moving from a crouched to a standing position.