The most common and most likely answer to this crossword clue is the 6 letter word SERIES
S
E
R
I
E
S
More clues leading to the result SERIES
- Run two sons across lake
- Geological formation is scorching – I kept inside
- Views capturing Rhode Island in long-running TV show
- Course of ship going round lake
- Cycle chain?
- Seconds to go round lake in train
- Row ship across lake
- Rows from ship around lake
- King and I having views about succession
- Run scripture classes in Ely and Exeter perhaps
Buddy explains!

The straight part
We know that "Geological formation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case geological formation = series.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 SERIES mean?
SERIES noun- A number of things that follow on one after the other or are connected one after the other.
- A television or radio program which consists of several episodes that are broadcast in regular intervals
- The sequence of partial sums \sum_{i=1}^n{a_i} of a given sequence ai.
- A group of matches between two sides, with the aim being to win more matches than the opposition.
- An unranked taxon.
- A subdivision of a genus, a taxonomic rank below that of section (and subsection) but above that of species.
- A parcel of rough diamonds of assorted qualities.
- A set of consonants that share a particular phonetic or phonological feature.
- Connected one after the other in a circuit.