Designer lotion ultimately collected by shaver (7)
I believe the answer is:
planner
'designer' is the definition.
(thesaurus)
'lotion ultimately collected by shaver' is the wordplay.
'lotion ultimately' becomes 'n' (I am not sure about this - if you are sure you should believe this answer much more).
'collected by' is an insertion indicator.
'shaver' becomes 'planer' (I've seen this in another clue).
'n' going inside 'planer' is 'PLANNER'.
Can you help me to learn more?
(Other definitions for planner that I've seen before include "Whole-year calendar" , "Council worker" , "diary, perhaps" , "One making advance arrangements" , "Whole year calendar" .)