The most common and most likely answer to this crossword clue is the 3 letter word BOG
B
O
G
More clues leading to the result BOG
- Betjeman’s first mistake defending Slough
- Wetland entry on website ignoring Lake
- Bachelor faces disaster defending the ladies?
- Fancy man in Grenoble craftily producing pink flower
- Short life one lost in Slough
- Poor personal hygiene’s good for convenience
- Desert? Not I — the reverse!
- Standard that is completely ordinary?
Buddy explains!

The straight part
We know that "convenience" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case convenience = bog.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 BOG mean?
BOG noun- An area of decayed vegetation (particularly sphagnum moss) which forms a wet spongy ground too soft for walking; a marsh or swamp.
- Confusion, difficulty, or any other thing or place that impedes progress in the manner of such areas.
- The acidic soil of such areas, principally composed of peat; marshland, swampland.
- A place to defecate: originally specifically a latrine or outhouse but now used for any toilet.
- An act or instance of defecation.
- A little elevated spot or clump of earth, roots, and grass, in a marsh or swamp.
- (now often with "down") To sink or submerge someone or something into bogland.
- To prevent or slow someone or something from making progress.
- (now often with "down") To sink and stick in bogland.
- To be prevented or impeded from making progress, to become stuck.
- (originally vulgar Britain) To defecate, to void one's bowels.
- (originally vulgar Britain) To cover or spray with excrement.
- To make a mess of something.
- An insect of the order Hemiptera (the “true bugs”).
- Any of various species of marine or freshwater crustaceans; e.g. a Morton Bay bug, mudbug.
- Any insect, arachnid, or other terrestrial arthropod that is a pest.
- Any insect, arachnid, myriapod or entognath.
- (chiefly computing and engineering jargon) A problem that needs fixing.
- A contagious illness; a bacterium or virus causing it
- An enthusiasm for something; an obsession
- A keen enthusiast or hobbyist.
- A concealed electronic eavesdropping or intercept device
- A small and usually invisible file (traditionally a single-pixel image) on a World Wide Web page, primarily used to track users.
- A small, usually transparent or translucent image placed in a corner of a television program to indicate what network or cable channel is televising it
- A manually positioned marker in flight instruments.
- A semi-automated telegraph key.
- Hobgoblin, scarecrow; anything that terrifies.
- ("the bug") HIV.
- A limited form of wild card in some variants of poker.
- A trilobite.
- A young apprentice jockey.
- A microfossil, particularly a foraminiferan.
- Puffery, boastfulness.
- To provoke, to bug.
- Bold; boastful; proud.
- (usually with "off") To go away.