Rough tech Sky developed (7)
I believe the answer is:
sketchy
'rough' is the definition.
(I've seen this before)
'tech sky developed' is the wordplay.
'developed' indicates an anagram.
'tech'+'sky'='techsky'
'techsky' with letters rearranged gives 'SKETCHY'.
(Other definitions for sketchy that I've seen before include "Not thorough or detailed" , "Imperfect" , "Cursory" , "Imprecise" , "Barely outlined" .)