Entire world to honour heartless gal first (5)
I believe the answer is:
globe
'entire world' is the definition.
'globe' can be an answer for 'world' (synonyms). I am unsure of the 'entire' bit.
'honour heartless gal first' is the wordplay.
'honour' becomes 'obe' (Order of the British Empire award).
'heartless' means to remove the middle letters.
'first' is a charade indicator (letters next to each other).
'gal' with its middle removed is 'gl'.
'obe' put after 'gl' is 'GLOBE'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for globe that I've seen before include "Spherical map" , "Boston, MA's newspaper" , "Representation of earth" , "Earth - sphere" , "Orb, ball" .)