If drug is taken with ale at sea, take his help (9)

I believe the answer is:

lifeguard

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'his help' is the definition.
'lifeguard' can be an answer for 'help' (lifeguard is a kind of help). I'm not certain of the 'his' bit.

'if drug is taken with ale at sea' is the wordplay.
'is taken with' means one lot of letters go next to another.
'at sea' is an anagram indicator.
'if'+'drug'+'ale'='ifdrugale'
'ifdrugale' is an anagram of 'LIFEGUARD'.

'take' is the link.

Can you help me to learn more?

(Other definitions for lifeguard that I've seen before include "beach official" , "Beach or pool employee" , "Person protecting bathers" .)

I've seen this clue in The Hindu.

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