Chief executive sobs uncontrollably (4)

I believe the answer is:

boss

I'm a little stuck... Click here to teach me more about this clue!

'chief executive' is the definition.
'boss' can be an answer for 'executive' (thesaurus). I am unsure of the 'chief' bit.

'sobs uncontrollably' is the wordplay.
'uncontrollably' indicates an anagram (I've seen this in other clues).
'sobs' is an anagram of 'BOSS'.

Can you help me to learn more?

(Other definitions for boss that I've seen before include "One who manages" , "27 [CHIEF]" , "Leader - knob on shield" , "Informal employer or superior" , "Behave overbearingly" .)

I've seen this clue in The Daily Express.

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