1950s presidential nickname (3)
I believe the answer is:
ike
'1950s presidential nickname' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ike that I've seen before include "Nickname for Dwight Eisenhower" , "President Eisenhower's nickname" , "Dwight D. Eisenhower, in short" , "President Eisenhower" , "US general who became president, in short" .)