Secreted by aphids (3)

I believe the answer is:

hid

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'secreted by aphids' is the definition.
'hid' can be an answer for 'secreted' (I've seen this in another clue). I am not certain of the 'by aphids' bit.

'secreted by aphids' is the wordplay.
'secreted by' indicates a hidden word.
'HID' is hidden within 'aphids'.

Can you help me to learn more?

(Other definitions for hid that I've seen before include "Concealed from sight" , "Concealed, kept secret" , "Shrouded" , "Kept out of sight" , "wanted to be sought?" .)

I've seen this clue in the Evening Standard.

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