Lineker's predecessor left a lot of people upset (5)

I believe the answer is:
lynam
'lineker's predecessor' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'left a lot of people upset' is the wordplay.
'left' becomes 'l' (common abbreviation).
'a lot of people' becomes 'many' (many people).
'upset' says the letters should be written in reverse.
'many' back-to-front is 'ynam'.
'l'+'ynam'='LYNAM'
Can you help me to learn more?
(Other definitions for lynam that I've seen before include "Des ____, ex-BBC sports presenter" , "Des --, TV presenter" , "Des -, second Countdown host" , "See 4 Down" , "22/26 [COUNTDOWN] presenter" .)
