Adapts igloos with bamboo, essentially, to give stability (6)
I believe the answer is:
aplomb
'stability' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for aplomb that I've seen before include "Self-possession, assurance" , "Self confidence" , "Great coolness and composure under strain" , "'Poise, sang-froid (6)'" , "Cool self-assurance" .)