Froth on drink? See male tucking in beam (8)

'beam' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'froth on drink? see male tucking in' is the wordplay.
'froth' becomes 'head' (head is a kind of froth).
'on drink?' becomes 'lap' (to lap is to drink up. I am not sure about the 'on' bit.).
'see male' becomes 'm' (common abbreviation).
'tucking in' indicates putting letters inside.
'lap' enclosing 'm' is 'lamp'.
'head'+'lamp'='HEADLAMP'

Can you help me to learn more?