Weaver supports head of bent flower (5)
I believe the answer is:
bloom
'flower' is the definition.
(synonyms)
'weaver supports head of bent' is the wordplay.
'weaver' becomes 'loom' (I've seen this before).
'supports' says to put letters next to each other (bottom letters provide a support for the top ones).
'head of' suggests taking the first letters.
The initial letter of 'bent' is 'b'.
'loom' after 'b' is 'BLOOM'.
(Other definitions for bloom that I've seen before include "Flush" , "Do very well" , "Produce flowers" , "Open" , "Blossom, flower" .)