Employing some of us to sing (5)

I believe the answer is:

using

'employing' is the definition.
(to employ is to use)

'some of us to sing' is the wordplay.
'some of' says to take the initial letters (I've seen 'some' mean this).
The initial letter of 'us' is 'u'.
'u'+'sing'='USING'

(Other definitions for using that I've seen before include "taking drugs" , "having recourse to" , "practice" , "Utilising" , "Exploiting for one's own advantage" .)

I've seen this clue in the Evening Standard.

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