Reeled in trout at sea intermittently on date (8)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

Alternate letters (intermittently) of T [r] O [u] T [a] T [s] E [a], then RE (on = on the subject of) + D (abbreviation for date). Reel, as a verb = totter = move unsteadily.