Statistical significance tell us if the difference between the two interventions is due to chance, or the difference is the intervention under investigation.
In research terms, statistical significance is a measure of the probability of the null hypothesis being true compared to the acceptable level of uncertainty regarding the true answer.
Tenny S, Abdelgawad I. Statistical Significance. [Updated 2022 Nov 21]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK459346/
Clinical Significance is the extent to which a study result is judged to be meaningful in relation to the diagnosis or treatment of disorders. It measures the extent that a change can create a meaningful response for the patient.