Design a modern detailed cover for detection gear (6)
I believe the answer is:
radome
'detection gear' is the definition.
(structure used in radar systems)
'design a modern detailed cover for' is the wordplay.
'design' is an anagram indicator.
'detailed' means to remove the last letter (the word must be end-less or 'de-tailed').
'cover for' is a charade indicator (letters next to each other).
'modern' with its last letter removed is 'moder'.
'a' after 'moder' is 'modera'.
'modera' with letters rearranged gives 'RADOME'.
(Other definitions for radome that I've seen before include "cover for electronic equipment" , "Radar antennae cover" , "Aircraft protective cover for radar equipment" , "Protective covering" , "Cover for microwave antennae" .)