The term 'STEELY, as Nerves' can be solved by the three letter word 'ICY'. This phrase is used to describe someone who is very calm and composed in a difficult situation. It is often used to describe someone who is able to remain collected and unemotional in a stressful or challenging environment. This phrase is derived from the adjective 'STEELY', which is used to describe something that is hard and strong, like steel. Therefore, the phrase 'STEELY, as Nerves' is used to describe someone who is able to remain strong and composed in a difficult situation.