The lady's bringing in gold left with international trucker (7)
I believe the answer is:
haulier
'trucker' is the definition.
(I've seen this before)
'the lady's bringing in gold left with international' is the wordplay.
'the lady' becomes 'her' (I've seen this before).
'bringing in' indicates putting letters inside.
'gold' becomes 'Au' (Au is the chemical symbol for gold).
'left with' becomes 'l' (common abbreviation. I am not sure about the 'with' bit.).
'international' becomes 'i' (abbreviation eg in IMF).
'au'+'l'+'i'='auli'
'her' enclosing 'auli' is 'HAULIER'.
Can you help me to learn more?
(Other definitions for haulier that I've seen before include "Trucking company" , "Trucker" , "One transports goods in a vehicle" , "He could transport" , "freight carrier" .)