Bellow, briefly, when presented with direct message assistant sent over - it shows how they should proceed (7)
I believe the answer is:
roadmap
'it shows how they should proceed' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'bellow briefly when presented with direct message assistant sent over' is the wordplay.
'bellow' becomes 'roar' (synonyms).
'briefly' means to remove the last letter.
'when presented with direct message' becomes 'dm' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'assistant' becomes 'PA' (personal assistant).
'sent over' is a reversal indicator.
'pa' in reverse letter order is 'ap'.
'roar' with its last letter taken off is 'roa'.
'roa'+'dm'+'ap'='ROADMAP'
Can you help me to learn more?
(Other definitions for roadmap that I've seen before include "Driver's navigation aid" , "Driver's chart showing routes" , "Plan for solving international problem?" , "Motorists' plan" , "Street plan" .)