Shaky and malnourished after another icy trek (7)
I believe the answer is:
rickety
'shaky' is the definition.
(I know that shaky can be written as rickety)
'another icy trek' is the wordplay.
'another' is an anagram indicator.
'icy'+'trek'='icytrek'
'icytrek' is an anagram of 'RICKETY'.
'and malnourished after' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for rickety that I've seen before include "liable to collapse" , "Not built to last" , "Unsteady" , "Likely to collapse" , "Shaky" .)