A model representing circadian clock–defence cross‐talk. Pathogen elicitors provide an input to the circadian clock via an unknown intermediate (depicted by a question mark). The circadian clock thus modulates the expression of various defence‐related circadian‐controlled genes (CCGs) via a putative binding of clock components to the promoter region of CCGs. CCA1/LHY, Circadian Clock Associated 1/Late elongated HYpocotyl; EE, evening element; ETI, effector‐triggered immunity; PTI, pathogen‐associated molecular pattern (PAMP)‐triggered immunity; SAR, systemic acquired resistance; TOC1, Timing Of CAB2 expression 1.