Crusader Cryptic

[Toronto]

I still can't finish it can you help?  And explain answers.

 

Chemical substance hire takes a long time (7)

R?a?e?t

Giant order has gold turn up in the caribbean (7)

A?t?g?a

Repairing missing top and tail (6) E?d?n?

Mark gets sailor an amulet (6) ???r?b

Officer gives mark to the spanish ??l?n??

Ordering to be informative (7) T???ing

Many thanks

 

 

 

[ineedahobby]

reagent.  A chemical.  Rent (hire) with age in it.

[ineedahobby]

ending.  mending missing its top (m).

[fergol]

5d antigua

8d ending

20d scarab

21a colonel

18d telling

4d reagent

[shaneystar]

Antigua Giant ant and chemical symbol for gold?

[Toronto]

Many thanks for all your replies, appreciated.