Firmly established capitals of Togo, Eritrea and Djibouti found on map (7)
I believe the answer is:
planted
'firmly established' is the definition.
'planted' can be an answer for 'established' (similar in meaning). I'm unsure of the 'firmly' bit.
'capitals of togo eritrea and djibouti found on map' is the wordplay.
'capitals of' indicates taking the first letters.
'and' means one lot of letters go next to another.
'djibouti' becomes 'd' (this could be a standard abbreviation of which I'm unaware).
'found on' says to put letters next to each other.
'map' becomes 'plan' (I've seen this in another clue).
The initial letters of 'togo eritrea' is 'te'.
'te' put next to 'd' is 'ted'.
'ted' after 'plan' is 'PLANTED'.
Can you help me to learn more?
(Other definitions for planted that I've seen before include "Put in the ground" , "Set in the soil for growth" .)