Like a well built woman at work, holding a tin opener (5)

'like a well built woman' is the definition.
I can't tell whether this defines the answer.

'work holding a tin opener' is the wordplay.
'work' becomes 'busy' (busying is a kind of working).
'holding' is an insertion indicator.
'opener' says to take the initial letters.
The first letter of 'tin' is 't'.
'busy' going around 't' is 'BUSTY'.

'at' acts as a link.

Can you help me to learn more?