Wipe top of cooker with very little fat on (5)
I believe the answer is:
clean
'wipe' is the definition.
(thesaurus)
'top of cooker with very little fat on' is the wordplay.
'top of' indicates taking the first letters.
'with very little fat' becomes 'lean' (I can't explain this - if you can you should give a lot more credence to this answer).
'on' is a charade indicator (letters next to each other).
The first letter of 'cooker' is 'c'.
'c'+'lean'='CLEAN'
Can you help me to learn more?
(Other definitions for clean that I've seen before include "Squeaky?" , "Devoid of dirt" , "Free from dirt; well defined" , "Sterile" , "Second part of 18" .)