Aide introducing English firm necessary for Franco (6)
I believe the answer is:
peseta
'necessary for franco' is the definition.
The definition suggests a singular noun which matches the answer.
'aide introducing english firm' is the wordplay.
'aide' becomes 'pa' (abbreviation for personal assistant).
'introducing' is an insertion indicator (some letters introduced or inserted into others).
'english' becomes 'e' (abbreviation).
'firm' becomes 'set' (both can mean fixed).
'e'+'set'='eset'
'pa' enclosing 'eset' is 'PESETA'.
Can you help me to learn more?
(Other definitions for peseta that I've seen before include "Coin from the sea pet" , "Old bread" , "Previous Spanish money unit" , "Old money - see Pat (anag)" , "Get ready once for Spain" .)