What Insulation Issue Hotsat-1 Satellite Measures

This page is the CodyCross answer for the clue below from Top Secret, Group 2085, Puzzle 3 (Codebreaker).

Question is: What Insulation Issue Hotsat-1 Satellite Measures

and the answer is: HEATLOSS

Word Meaning:

HEAT — (uncountable) Thermal energy.

Definitions from Wiktionary.