Look at and follow monitor (8)
I believe the answer is:
watchdog
'monitor' is the definition.
(I've seen this before)
'look at and follow' is the wordplay.
'look at' becomes 'watch' (I've seen this before).
'and' is a charade indicator (letters next to each other).
'follow' becomes 'dog' (I've seen this before).
'watch'+'dog'='WATCHDOG'
(Other definitions for watchdog that I've seen before include "Heroic poem" , "Monitoring organisation" , "Canine guard" , "protector" , "Kind of guardian, maybe canine" .)