Blend from firm in Glencoe (6)
I believe the answer is:
mingle
'blend' is the definition.
(I know that blend is a more specific form of the action mingle)
'from firm in glencoe' is the wordplay.
'from' indicates the answer is hidden within the clue.
'MINGLE' is hidden in the letters of 'firm in glencoe'.
(Other definitions for mingle that I've seen before include "Mix together" , "Join in the crowd, be sociable" , "Mix, get involved with people" , "Circulate, socialise" , "Circulate at a party" .)