Collected on ice, perhaps (4)
I believe the answer is:
cool
I believe this clue is a double definition.
'collected' is the first definition.
(I've seen this in another clue)
'ice perhaps' is the second definition.
(icing is a kind of cooling)
'on' acts as a link.
(Other definitions for cool that I've seen before include "Relaxed; not warm" , "Free of heat; laid-back" , "Unenthusiastic; excellent" , "Super!" , "Calm and unemotional" .)