Higher in rank (6)

'higher in rank' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for senior that I've seen before include "Being old" , "Older in years or higher in rank" , "Superior - elder" , "Higher in rank or authority" , "Elder person - higher in rank" .)
(Another definition for smellier that I've seen is " More pongy".)