Crossword Genius

Sending up manager if golfer blocks heat source (3,4)

Ross

I believe the answer is:

log fire

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'heat source' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'sending up manager if golfer blocks' is the wordplay.
'sending up' says the letters should be written in reverse (in a down clue, letters go up).
'blocks' indicates the answer is hidden within the clue (block can mean to contain or entrap).
'erifgol' is hidden within 'manager if golfer'.
'erifgol' written backwards gives 'LOG FIRE'.

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I've seen this clue in The Irish Times.
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