Bootlicking Sergeant-Major leading his men? (6)
I believe the answer is:
smarmy
'bootlicking' is the definition.
(I've seen this before)
'sergeant-major leading his men?' is the wordplay.
'sergeant-major' becomes 'sm' (military abbreviation).
'leading his men?' becomes 'army' (I can't justify this - if you can you should give a lot more credence to this answer).
'sm'+'army'='SMARMY'
Can you help me to learn more?
(Other definitions for smarmy that I've seen before include "Bootlicking" , "Excessively flattering (R, not L)" , "Unpleasantly suave or ingratiating" , "Conceal oneself" , "Oleaginous" .)