Stress it may be current American money (6)
I believe the answer is:
accent
'stress' is the definition.
(accent can mean to emphasise or stress)
'current american money' is the wordplay.
'current' becomes 'ac' (alternating current).
'american money' becomes 'cent' (eg denomination of dollars. I am not sure about the 'american' bit.).
'ac'+'cent'='ACCENT'
'it may be' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for accent that I've seen before include "Stress - regional dialect" , "Possibly a grave sign" , "intensity" , "Place stress on, say a syllable" , "Stress, emphasis" .)