He infiltrates groups producing bedlinen (6)
I believe the answer is:
sheets
'bedlinen' is the definition.
I can't tell whether this defines the answer.
'he infiltrates groups' is the wordplay.
'infiltrates' indicates putting letters inside.
'groups' becomes 'sets' (I've seen this in other clues).
'he' going into 'sets' is 'SHEETS'.
'producing' is the link.
Can you help me to learn more?
(Other definitions for sheets that I've seen before include "Flat pieces, of cloth or paper say" , "She set them on the bed" , "Bedclothes to be found on ships?" , "Leaves" , "Bed coverings for the sailor's ropes" .)