Personally devoted to poorly-manufactured alloy (5)
I believe the answer is:
loyal
'personally devoted' is the definition.
'loyal' can be an answer for 'devoted' (similar in meaning). I'm not certain of the 'personally' bit.
'poorly-manufactured alloy' is the wordplay.
'alloy' anagrams to 'LOYAL'.
Though, I'm unsure how the anagram is indicated.
'to' is the link.
Can you help me to learn more?
(Other definitions for loyal that I've seen before include "firm in solidarity" , "True to one's country etc" , "True-hearted" , "Solid" , "Faithful - reliable" .)