Variety of lettuce (7)
'variety of lettuce' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for iceberg that I've seen before include "Polar shipping hazard" , "calf, perhaps" , "Kind of lettuce" , "One sank the Titanic" , "arctic feature" .)
'variety of lettuce' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cos that I've seen before include "Kind of lettuce in microcosm" , "Variety of lettuce" , "leaves > function" , "in the Dodecanese?" , "Salad ingredient" .)