Troll lost last war over headlines (5)

I believe the answer is:

trawl

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'troll' is the definition.
(thesaurus)

'lost last war over headlines' is the wordplay.
'lost' indicates an anagram.
'last' becomes 't' (I've seen this in other clues).
'over headlines' becomes 'l' (I can't justify this - if you can you should give a lot more credence to this answer).
't'+'war'='twar'
'twar' anagrammed gives 'traw'.
'traw'+'l'='TRAWL'

Can you help me to learn more?

(Other definitions for trawl that I've seen before include "Drag nets" , "Net dragged behind fishing boats" , "Fish with a large net" , "Large wide-mouthed fishing net, usually dragged" , "Fishing dragnet" .)

I've seen this clue in the Sydney Morning Herald.

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