When to get a hold of large blue permits (6)
I believe the answer is:
allows
'permits' is the definition.
(I know this)
'when to get a hold of large blue' is the wordplay.
'when' becomes 'as' (eg 'when I walked' means 'as I walked').
'to get' means one lot of letters goes inside another.
'a hold of large' becomes 'l' (I can't explain this - if you can you should give a lot more credence to this answer).
'blue' becomes 'low' (both can mean sad).
'l'+'low'='llow'
'as' enclosing 'llow' is 'ALLOWS'.
Can you help me to learn more?
(Other definitions for allows that I've seen before include "Gives permission" , "Tolerates" , "Permits to do something" , "Permits, lets" , "Grants leave" .)