Engineer cried about every single phone feature (6,2)

I believe the answer is:

caller id

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'phone feature' is the definition.
(I've seen this in another clue)

'engineer cried about every' is the wordplay.
'engineer' is an anagram indicator.
'about' means one lot of letters goes inside another.
'every' becomes 'all' (similar in meaning).
'cried' with letters rearranged gives 'cerid'.
'cerid' enclosing 'all' is 'CALLER ID'.

'single' is the link.
This may not be right. It may be part of another bit of the clue.

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I've seen this clue in The Times.

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