S&M with men bound under orders for boot-licking (6)
I believe the answer is:
smarmy
'boot-licking' is the definition.
I can't judge whether this definition defines the answer.
'sm with men bound under orders' is the wordplay.
'with' means one lot of letters goes inside another.
'men' becomes 'm' (abbreviation).
'bound under orders' becomes 'ary' (I can't justify this - if you can you should give a lot more credence to this answer).
'm' put inside 'ary' is 'army'.
'sm'+'army'='SMARMY'
'for' is the link.
Can you help me to learn more?
(Other definitions for smarmy that I've seen before include "Conceal oneself" , "Unctuous" , "Oily" , "Slick" , "Excessively flattering (R, not L)" .)
