Cunning creature tucks head down a minute: it brings relief (5)
I believe the answer is:
oxfam
'it brings relief' is the definition.
(Oxfam is a charity)
'cunning creature tucks head down a minute' is the wordplay.
I cannot really see how this works, but
'creature' could be 'ox' (castrated bull) and 'ox' is found in the answer.
'a' is found in the answer.
'minute' could be 'm' (abbreviation) and 'm' is found within the answer.
A single letter 'f' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
(Other definitions for oxfam that I've seen before include "A famine-relief charity" , "relief agency" , "Famine relief charity" , "Famine relief organisation" , "Disaster-relief charity" .)