Well, the clover is the symbol of the leprechaun ;)
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It could be for gambler job. Gambling is all about luck of the draw. It could also be for 3 new jobs for 7.0.
Strictly speaking, look at SMN and RDM.
Both have a Raise. Both have (some kind of) cure/heal. Both have a party buff, RDM has two (Barrier).
Take old ShB SMN. Remove the Demis/Egis and replace them with poison/miasma/toxic themed spells. Give it a 60 sec CD party buff (yes, it's a bad idea ala Trick Attack starting the meta back in 2.4, but that doesn't mean they won't do it; remember where they removed party buffs from BRD and MCH to say that Jobs shouldn't buff other party members...then turned around and immediately introduced DNC?). And make its DoTs do things like old Fester for more damage and Bane for spreading, and have something that procs randomly on DoT ticks. Throw in a dash of Saboteur from FF13.
Bam, you have a Green Mage. Debuffs the enemy (DoTs), buffs the party (60 sec "frequent" party buff). That would be FFXIV's take on Green Mage, much like how FFXIV's RDM doesn't have Cure 3 but it has Verholy.
Nah, new job is Brewmaster...
All enemies will be slain with a pint of Guinness