Measure on beer loses one small brand (5)
I believe the answer is:
ember
'small brand' is the definition.
'ember' can be an answer for 'brand' (thesaurus). I am not certain of the 'small' bit.
'measure on beer loses one' is the wordplay.
'measure' becomes 'em' (em is a unit of measurement used by printers).
'loses' is a deletion indicator.
'on'+'beer'='onbeer'
'onbeer' with 'one' taken away is 'ber'.
'em'+'ber'='EMBER'
Can you help me to learn more?
(Other definitions for ember that I've seen before include "Smouldering piece left over from a fire" , "Glowing coal; type of goose" , "Small piece of glowing coal in a dying fire" , "Hot piece of wood or coal from a fire" , "showing residual fire" .)