Crossword Genius

Take lead from large boss (4)

Ross

I believe the answer is:

umbo

'boss' is the definition.
(the boss on a shield)

'take lead from large' is the wordplay.
'take lead from' means to remove the first letter.
'large' becomes 'jumbo' ('jumbo' can be similar in meaning to 'large').
'jumbo' with its initial letter taken off is 'UMBO'.

(Another definition for umbo that I've seen is " Boss on a shield".)

I've seen this clue in The Times.
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