The phrase "a tight cluster of" is correct and usable in written English.
It can be used to describe a closely grouped set of items, people, or phenomena.
Example: "In the garden, there was a tight cluster of vibrant flowers that caught everyone's attention."
Alternatives: "a close grouping of" or "a dense collection of".
A tight cluster of firefighters is a sign of another find.
Footage showed a tight cluster of people, shoving one another and appearing to shout.
CONS: Located among a tight cluster of former factory-workers' homes, the property is surrounded by busy thoroughfares.
Even the bigger amounts are easily obtained in well-known spots like the Ilyas Goth shantytown, a tight cluster of wood and concrete shacks.
Within about 30 seconds there were reports of further casualties and it began to become clear there was a tight cluster of mines, Tootal said.
Then he turned to a small room with a low ceiling, an empty wardrobe and a tight cluster of bullet holes in one wall, he said.
A visual appraisal of Fig. 2 can provide initial insight into candidate RG expression stability, as some RGs demonstrated a tight clustering of CT values (e.g. RG1, RG3, RG5, RG7, RG8, and RG9) while others demonstrated a spread in CT values (e.g. RG2, RG4, RG6, and RG10) across growth conditions.
Complete homogenization of type 2a inclusions in sample Gran-1b occurred at temperatures between 288 and 385°C, and there was a tight clustering of homogenization temperatures at 344 ± 15°C (Figure 7).
This analysis of the Ste20p physical interactors also highlights a tight clustering of proteins related to polarized growth (Figure 5, Figure S3).
Classical unsupervised clustering analysis and statistical analysis of microarray data revealed a tight clustering of PCTs regardless of subtype.
With the exception of Mexican ecotypes, a tight clustering of worldwide collected J. curcas accessions was reported based on RAPD and ISSR markers [ 5].
