Have faith in cover held back by worker (7)
I believe the answer is:
believe
'have faith' is the definition.
(I've seen this before)
'cover held back by worker' is the wordplay.
'cover' suggests removing the centre (I've seen 'covers of' mean this).
'held' becomes 'bore' (I've seen this before).
'back by worker' becomes 'lieve' (I can't explain this - if you can you should believe this answer much more).
'bore' with its centre taken out is 'be'.
'be'+'lieve'='BELIEVE'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for believe that I've seen before include "Credit; accept" , "Have religious faith" , "Regard as true" , "Trust" , "Have faith; accept" .)