Replace suede pants keeping Charlie cold (7)
I believe the answer is:
succeed
'replace' is the definition.
(I know that replace is a more specific form of the action succeed)
'suede pants keeping charlie cold' is the wordplay.
'pants' is an anagram indicator (UK informal term for 'nonsense' or 'rubbish').
'keeping' indicates putting letters inside (some letters kept inside).
'charlie' becomes 'C' (phonetic alphabet: alpha, bravo, charlie etc.).
'cold' becomes 'C' (eg on taps).
'suede' is an anagram of 'sueed'.
'c'+'c'='cc'
'sueed' enclosing 'cc' is 'SUCCEED'.
(Other definitions for succeed that I've seen before include "Accomplish a goal" , "Make good" , "what prince royal might do" , "Follow on - win" , "Take the place previously occupied by - be a winner" .)