Select arm for security team (7,6)
I believe the answer is:
special branch
'select arm for security team' is the definition.
I can't judge whether this definition defines the answer.
'arm for security team' is the wordplay.
'arm' becomes 'branch' (synonyms).
'for' means one lot of letters go next to another (I've seen this in other clues).
'security team' becomes 'special' (I can't justify this - if you can you should believe this answer much more).
'branch' put after 'special' is 'SPECIAL BRANCH'.
Can you help me to learn more?
(Other definitions for special branch that I've seen before include "Police department dealing with political security" , "Police responsible for political security" , "Division of police dealing with political security" , "counter-terrorist unit?" , "officers" .)